macOS/iOS: Fix unguarded availability warnings

examples/DemoRunner/Builds/MacOSX/DemoRunner.xcodeproj/project.pbxproj

@@ -575,8 +575,8 @@
 				LLVM_LTO = YES;
 				MACOSX_DEPLOYMENT_TARGET = 10.11;
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/VST3_SDK $(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.rmsl.jucedemorunner;
 				PRODUCT_NAME = "DemoRunner";
@@ -667,8 +667,8 @@
 				INSTALL_PATH = "$(HOME)/Applications";
 				MACOSX_DEPLOYMENT_TARGET = 10.11;
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/VST3_SDK $(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.rmsl.jucedemorunner;
 				PRODUCT_NAME = "DemoRunner";

examples/DemoRunner/Builds/iOS/DemoRunner.xcodeproj/project.pbxproj

@@ -578,8 +578,8 @@
 				INSTALL_PATH = "$(HOME)/Applications";
 				LLVM_LTO = YES;
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/VST3_SDK $(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.rmsl.jucedemorunner;
 				PRODUCT_NAME = "DemoRunner";
@@ -670,8 +670,8 @@
 				INFOPLIST_PREPROCESS = NO;
 				INSTALL_PATH = "$(HOME)/Applications";
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/VST3_SDK $(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.rmsl.jucedemorunner;
 				PRODUCT_NAME = "DemoRunner";

extras/AudioPluginHost/Builds/MacOSX/AudioPluginHost.xcodeproj/project.pbxproj

@@ -500,8 +500,8 @@
 				LLVM_LTO = YES;
 				MACOSX_DEPLOYMENT_TARGET = 10.11;
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/VST3_SDK $(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.juce.pluginhost;
 				PRODUCT_NAME = "AudioPluginHost";
@@ -640,8 +640,8 @@
 				INSTALL_PATH = "$(HOME)/Applications";
 				MACOSX_DEPLOYMENT_TARGET = 10.11;
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/VST3_SDK $(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.juce.pluginhost;
 				PRODUCT_NAME = "AudioPluginHost";

extras/AudioPluginHost/Builds/iOS/AudioPluginHost.xcodeproj/project.pbxproj

@@ -508,8 +508,8 @@
 				INSTALL_PATH = "$(HOME)/Applications";
 				LLVM_LTO = YES;
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/VST3_SDK $(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.juce.pluginhost;
 				PRODUCT_NAME = "Plugin Host";
@@ -649,8 +649,8 @@
 				INFOPLIST_PREPROCESS = NO;
 				INSTALL_PATH = "$(HOME)/Applications";
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/VST3_SDK $(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.juce.pluginhost;
 				PRODUCT_NAME = "Plugin Host";

extras/Build/CMake/JUCEHelperTargets.cmake

@@ -31,7 +31,9 @@ elseif((CMAKE_CXX_COMPILER_ID STREQUAL "Clang") OR (CMAKE_CXX_COMPILER_ID STREQU
         $<$<OR:$<COMPILE_LANGUAGE:CXX>,$<COMPILE_LANGUAGE:OBJCXX>>:
             -Wzero-as-null-pointer-constant -Wunused-private-field
             -Woverloaded-virtual -Wreorder
-            -Winconsistent-missing-destructor-override>)
+            -Winconsistent-missing-destructor-override>
+        $<$<OR:$<COMPILE_LANGUAGE:OBJC>,$<COMPILE_LANGUAGE:OBJCXX>>:
+            -Wunguarded-availability -Wunguarded-availability-new>)
 elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     target_compile_options(juce_recommended_warning_flags INTERFACE
         -Wall -Wextra -Wpedantic -Wstrict-aliasing -Wuninitialized

extras/Projucer/Builds/MacOSX/Projucer.xcodeproj/project.pbxproj

@@ -1173,8 +1173,8 @@
 				INSTALL_PATH = "$(HOME)/Applications";
 				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../Build $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.juce.theprojucer;
 				PRODUCT_NAME = "Projucer";
@@ -1244,8 +1244,8 @@
 				INSTALL_PATH = "$(HOME)/Applications";
 				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../Build $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.juce.theprojucer;
 				PRODUCT_NAME = "Projucer";

extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Xcode.h

@@ -1599,6 +1599,7 @@ public:
                 s.set ("GCC_FAST_MATH", "YES");
 
             auto recommendedWarnings = config.getRecommendedCompilerWarningFlags();
+            recommendedWarnings.common.addArray (recommendedWarnings.objc);
             recommendedWarnings.cpp.addArray (recommendedWarnings.common);
 
             struct XcodeWarningFlags

extras/Projucer/Source/ProjectSaving/jucer_ProjectExporter.cpp

@@ -894,6 +894,9 @@ ProjectExporter::BuildConfiguration::BuildConfiguration (Project& p, const Value
     llvmFlags.cpp.addArray ({
         "-Wunused-private-field", "-Winconsistent-missing-destructor-override"
     });
+    llvmFlags.objc.addArray ({
+        "-Wunguarded-availability", "-Wunguarded-availability-new"
+    });
 
     auto& gccFlags = recommendedCompilerWarningFlags[CompilerNames::gcc] = BuildConfiguration::CompilerWarningFlags::getRecommendedForGCCAndLLVM();
     gccFlags.common.addArray ({

extras/Projucer/Source/ProjectSaving/jucer_ProjectExporter.h

@@ -289,8 +289,7 @@ public:
                 return result;
             }
 
-            StringArray common;
-            StringArray cpp;
+            StringArray common, cpp, objc;
         };
 
         CompilerWarningFlags getRecommendedCompilerWarningFlags() const;

extras/UnitTestRunner/Builds/MacOSX/UnitTestRunner.xcodeproj/project.pbxproj

@@ -465,8 +465,8 @@
 				LLVM_LTO = YES;
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/VST3_SDK $(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.juce.UnitTestRunner;
 				PRODUCT_NAME = "UnitTestRunner";
@@ -598,8 +598,8 @@
 				INSTALL_PATH = "/usr/bin";
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				MTL_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lilv $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sratom $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord/src $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/sord $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/serd $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK/lv2 $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/LV2_SDK $(SRCROOT)/../../../../modules/juce_audio_processors/format_types/VST3_SDK $(SRCROOT)/../../JuceLibraryCode $(SRCROOT)/../../../../modules";
-				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
-				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes";
+				OTHER_CFLAGS = "-Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
+				OTHER_CPLUSPLUSFLAGS = "-Woverloaded-virtual -Wreorder -Wzero-as-null-pointer-constant -Wunused-private-field -Winconsistent-missing-destructor-override -Wall -Wstrict-aliasing -Wuninitialized -Wunused-parameter -Wswitch-enum -Wsign-conversion -Wsign-compare -Wunreachable-code -Wcast-align -Wno-ignored-qualifiers -Wshorten-64-to-32 -Wconversion -Wint-conversion -Wconditional-uninitialized -Wconstant-conversion -Wbool-conversion -Wextra-semi -Wshift-sign-overflow -Wshadow-all -Wnullable-to-nonnull-conversion -Wmissing-prototypes -Wunguarded-availability -Wunguarded-availability-new";
 				OTHER_LDFLAGS = "-weak_framework Metal -weak_framework MetalKit";
 				PRODUCT_BUNDLE_IDENTIFIER = com.juce.UnitTestRunner;
 				PRODUCT_NAME = "UnitTestRunner";

modules/juce_audio_devices/native/juce_mac_CoreMidi.mm

@@ -82,10 +82,8 @@ namespace CoreMidiHelpers
     struct Sender;
 
    #if JUCE_HAS_NEW_COREMIDI_API
-    JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wunguarded-availability", "-Wunguarded-availability-new")
-
     template <>
-    struct Sender<ImplementationStrategy::onlyNew> : public SenderBase
+    struct API_AVAILABLE (macos (11.0), ios (14.0)) Sender<ImplementationStrategy::onlyNew> : public SenderBase
     {
         explicit Sender (MIDIEndpointRef ep)
             : umpConverter (getProtocolForEndpoint (ep))
@@ -177,8 +175,6 @@ namespace CoreMidiHelpers
             send();
         }
     };
-
-    JUCE_END_IGNORE_WARNINGS_GCC_LIKE
    #endif
 
    #if JUCE_HAS_OLD_COREMIDI_API
@@ -829,10 +825,8 @@ namespace CoreMidiHelpers
     struct CreatorFunctions;
 
    #if JUCE_HAS_NEW_COREMIDI_API
-    JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wunguarded-availability", "-Wunguarded-availability-new")
-
     template <>
-    struct CreatorFunctions<ImplementationStrategy::onlyNew>
+    struct API_AVAILABLE (macos (11.0), ios (14.0)) CreatorFunctions<ImplementationStrategy::onlyNew>
     {
         static OSStatus createInputPort (ump::PacketProtocol protocol,
                                          MIDIClientRef client,
@@ -894,8 +888,6 @@ namespace CoreMidiHelpers
             static_cast<MidiPortAndCallback*> (readProcRefCon)->handlePackets (*list);
         }
     };
-
-    JUCE_END_IGNORE_WARNINGS_GCC_LIKE
    #endif
 
    #if JUCE_HAS_OLD_COREMIDI_API

modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm

@@ -281,7 +281,7 @@ namespace AudioUnitFormatHelpers
                     NSBundle* bundle = [[NSBundle alloc] initWithPath: (NSString*) fileOrIdentifier.toCFString()];
 
                     NSArray* audioComponents = [bundle objectForInfoDictionaryKey: @"AudioComponents"];
-                    NSDictionary* dict = audioComponents[0];
+                    NSDictionary* dict = [audioComponents objectAtIndex: 0];
 
                     desc.componentManufacturer = stringToOSType (nsStringToJuce ((NSString*) [dict valueForKey: @"manufacturer"]));
                     desc.componentType         = stringToOSType (nsStringToJuce ((NSString*) [dict valueForKey: @"type"]));
@@ -416,6 +416,14 @@ namespace AudioUnitFormatHelpers
         */
         std::vector<size_t> channels;
     };
+
+    static bool isPluginAUv3 (const AudioComponentDescription& desc)
+    {
+        if (@available (macOS 10.11, *))
+            return (desc.componentFlags & kAudioComponentFlag_IsV3AudioUnit) != 0;
+
+        return false;
+    }
 }
 
 //==============================================================================
@@ -636,7 +644,7 @@ public:
 
         AudioComponentGetDescription (auComponent, &componentDesc);
 
-        isAUv3 = ((componentDesc.componentFlags & kAudioComponentFlag_IsV3AudioUnit) != 0);
+        isAUv3 = AudioUnitFormatHelpers::isPluginAUv3 (componentDesc);
 
         wantsMidiMessages = componentDesc.componentType == kAudioUnitType_MusicDevice
                          || componentDesc.componentType == kAudioUnitType_MusicEffect
@@ -2545,7 +2553,10 @@ private:
     {
         const auto viewSize = [&controller]
         {
-            auto size = [controller preferredContentSize];
+            auto size = CGSizeZero;
+
+            if (@available (macOS 10.11, *))
+                size = [controller preferredContentSize];
 
             if (size.width == 0 || size.height == 0)
                 size = controller.view.frame.size;
@@ -2854,12 +2865,15 @@ void AudioUnitPluginFormat::createPluginInstance (const PluginDescription& desc,
 
         auto callbackBlock = new AUAsyncInitializationCallback (rate, blockSize, std::move (callback));
 
-        if ((componentDesc.componentFlags & kAudioComponentFlag_IsV3AudioUnit) != 0)
+        if (AudioUnitFormatHelpers::isPluginAUv3 (componentDesc))
         {
-            AudioComponentInstantiate (auComponent, kAudioComponentInstantiation_LoadOutOfProcess,
-                                       callbackBlock->getBlock());
+            if (@available (macOS 10.11, *))
+            {
+                AudioComponentInstantiate (auComponent, kAudioComponentInstantiation_LoadOutOfProcess,
+                                           callbackBlock->getBlock());
 
-            return;
+                return;
+            }
         }
 
         AudioComponentInstance audioUnit;
@@ -2883,8 +2897,10 @@ bool AudioUnitPluginFormat::requiresUnblockedMessageThreadDuringCreation (const
                                                                 pluginName, version, manufacturer))
     {
         if (AudioComponent auComp = AudioComponentFindNext (nullptr, &componentDesc))
+        {
             if (AudioComponentGetDescription (auComp, &componentDesc) == noErr)
-                return ((componentDesc.componentFlags & kAudioComponentFlag_IsV3AudioUnit) != 0);
+                return AudioUnitFormatHelpers::isPluginAUv3 (componentDesc);
+        }
     }
 
     return false;
@@ -2916,11 +2932,7 @@ StringArray AudioUnitPluginFormat::searchPathsForPlugins (const FileSearchPath&,
              || desc.componentType == kAudioUnitType_Mixer
              || desc.componentType == kAudioUnitType_MIDIProcessor)
         {
-            ignoreUnused (allowPluginsWhichRequireAsynchronousInstantiation);
-
-            const auto isAUv3 = ((desc.componentFlags & kAudioComponentFlag_IsV3AudioUnit) != 0);
-
-            if (allowPluginsWhichRequireAsynchronousInstantiation || ! isAUv3)
+            if (allowPluginsWhichRequireAsynchronousInstantiation || ! AudioUnitFormatHelpers::isPluginAUv3 (desc))
                 result.add (AudioUnitFormatHelpers::createPluginIdentifier (desc));
         }
     }

modules/juce_audio_utils/native/juce_mac_BluetoothMidiDevicePairingDialogue.mm

@@ -20,7 +20,7 @@ namespace juce
 {
 
 //==============================================================================
-class BluetoothMidiPairingWindowClass   : public ObjCClass<NSObject>
+class API_AVAILABLE (macos (10.11)) BluetoothMidiPairingWindowClass : public ObjCClass<NSObject>
 {
 public:
     struct Callbacks
@@ -110,7 +110,7 @@ private:
     }
 };
 
-class BluetoothMidiSelectorWindowHelper   : public DeletedAtShutdown
+class API_AVAILABLE (macos (10.11)) BluetoothMidiSelectorWindowHelper : public DeletedAtShutdown
 {
 public:
     BluetoothMidiSelectorWindowHelper (ModalComponentManager::Callback* exitCallback,

modules/juce_core/native/juce_mac_Files.mm

@@ -528,8 +528,9 @@ void File::addToDock() const
 
 File File::getContainerForSecurityApplicationGroupIdentifier (const String& appGroup)
 {
-    if (auto* url = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier: juceStringToNS (appGroup)])
-        return File (nsStringToJuce ([url path]));
+    if (@available (macOS 10.8, *))
+        if (auto* url = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier: juceStringToNS (appGroup)])
+            return File (nsStringToJuce ([url path]));
 
     return File();
 }

modules/juce_core/native/juce_mac_Network.mm

@@ -393,7 +393,7 @@ JUCE_END_IGNORE_WARNINGS_GCC_LIKE
 #endif
 
 //==============================================================================
-class URLConnectionState   : public URLConnectionStateBase
+class API_AVAILABLE (macos (10.9)) URLConnectionState : public URLConnectionStateBase
 {
 public:
     URLConnectionState (NSURLRequest* req, const int maxRedirects)

modules/juce_core/native/juce_mac_ObjCHelpers.h

@@ -164,7 +164,7 @@ inline var nsDictionaryToVar (NSDictionary* dictionary)
     DynamicObject::Ptr dynamicObject (new DynamicObject());
 
     for (NSString* key in dictionary)
-        dynamicObject->setProperty (nsStringToJuce (key), nsObjectToVar (dictionary[key]));
+        dynamicObject->setProperty (nsStringToJuce (key), nsObjectToVar ([dictionary objectForKey: key]));
 
     return var (dynamicObject.get());
 }

modules/juce_events/native/juce_ScopedLowPowerModeDisabler.cpp

@@ -28,12 +28,21 @@ namespace juce
 class ScopedLowPowerModeDisabler::Pimpl
 {
 public:
-    Pimpl() = default;
-    ~Pimpl() { [[NSProcessInfo processInfo] endActivity: activity]; }
+    Pimpl()
+    {
+        if (@available (macOS 10.9, *))
+            activity = [[NSProcessInfo processInfo] beginActivityWithOptions: NSActivityUserInitiatedAllowingIdleSystemSleep
+                                                                      reason: @"App must remain in high-power mode"];
+    }
+
+    ~Pimpl()
+    {
+        if (@available (macOS 10.9, *))
+            [[NSProcessInfo processInfo] endActivity: activity];
+    }
 
 private:
-    id activity { [[NSProcessInfo processInfo] beginActivityWithOptions: NSActivityUserInitiatedAllowingIdleSystemSleep
-                                                                 reason: @"App must remain in high-power mode"] };
+    id activity;
 
     JUCE_DECLARE_NON_COPYABLE (Pimpl)
     JUCE_DECLARE_NON_MOVEABLE (Pimpl)

modules/juce_gui_basics/native/accessibility/juce_ios_Accessibility.mm

@@ -34,31 +34,6 @@ namespace juce
  #define JUCE_IOS_CONTAINER_API_AVAILABLE 1
 #endif
 
-JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wunguarded-availability", "-Wunguarded-availability-new")
-
-constexpr auto juceUIAccessibilityContainerTypeNone =
-                   #if JUCE_IOS_CONTAINER_API_AVAILABLE
-                    UIAccessibilityContainerTypeNone;
-                   #else
-                    0;
-                   #endif
-
-constexpr auto juceUIAccessibilityContainerTypeDataTable =
-                   #if JUCE_IOS_CONTAINER_API_AVAILABLE
-                    UIAccessibilityContainerTypeDataTable;
-                   #else
-                    1;
-                   #endif
-
-constexpr auto juceUIAccessibilityContainerTypeList =
-                   #if JUCE_IOS_CONTAINER_API_AVAILABLE
-                    UIAccessibilityContainerTypeList;
-                   #else
-                    2;
-                   #endif
-
-JUCE_END_IGNORE_WARNINGS_GCC_LIKE
-
 #define JUCE_NATIVE_ACCESSIBILITY_INCLUDED 1
 
 //==============================================================================
@@ -157,7 +132,12 @@ private:
             if (auto* handler = getHandler (self))
             {
                 if (handler->getTableInterface() != nullptr)
-                    return juceUIAccessibilityContainerTypeDataTable;
+                {
+                    if (@available (iOS 11.0, *))
+                        return UIAccessibilityContainerTypeDataTable;
+
+                    return 1; // UIAccessibilityContainerTypeDataTable
+                }
 
                 const auto role = handler->getRole();
 
@@ -165,11 +145,17 @@ private:
                     || role == AccessibilityRole::list
                     || role == AccessibilityRole::tree)
                 {
-                    return juceUIAccessibilityContainerTypeList;
+                    if (@available (iOS 11.0, *))
+                        return UIAccessibilityContainerTypeList;
+
+                    return 2; // UIAccessibilityContainerTypeList
                 }
             }
 
-            return juceUIAccessibilityContainerTypeNone;
+            if (@available (iOS 11.0, *))
+                return UIAccessibilityContainerTypeNone;
+
+            return 0; // UIAccessibilityContainerTypeNone
         }
     };
 

modules/juce_gui_basics/native/accessibility/juce_mac_Accessibility.mm

@@ -16,6 +16,7 @@
   ==============================================================================
 */
 
+API_AVAILABLE (macos (10.10))
 static void juceFreeAccessibilityPlatformSpecificData (NSAccessibilityElement<NSAccessibility>*)  {}
 
 namespace juce
@@ -28,16 +29,17 @@ namespace juce
 
 #define JUCE_NATIVE_ACCESSIBILITY_INCLUDED 1
 
-JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wunguarded-availability", "-Wunguarded-availability-new")
-
 //==============================================================================
 class AccessibilityHandler::AccessibilityNativeImpl
 {
 public:
     explicit AccessibilityNativeImpl (AccessibilityHandler& handler)
-        : accessibilityElement (AccessibilityElement::create (handler))
-    {}
+    {
+        if (@available (macOS 10.10, *))
+            accessibilityElement = AccessibilityElement::create (handler);
+    }
 
+    API_AVAILABLE (macos (10.10))
     NSAccessibilityElement<NSAccessibility>* getAccessibilityElement() const noexcept
     {
         return accessibilityElement.get();
@@ -45,7 +47,7 @@ public:
 
 private:
     //==============================================================================
-    class AccessibilityElement  : public AccessibleObjCClass<NSAccessibilityElement<NSAccessibility>>
+    class API_AVAILABLE (macos (10.10)) AccessibilityElement  : public AccessibleObjCClass<NSAccessibilityElement<NSAccessibility>>
     {
     public:
         static Holder create (AccessibilityHandler& handler)
@@ -823,6 +825,7 @@ private:
     };
 
     //==============================================================================
+    API_AVAILABLE (macos (10.10))
     AccessibilityElement::Holder accessibilityElement;
 
     //==============================================================================
@@ -832,7 +835,10 @@ private:
 //==============================================================================
 AccessibilityNativeHandle* AccessibilityHandler::getNativeImplementation() const
 {
-    return (AccessibilityNativeHandle*) nativeImpl->getAccessibilityElement();
+    if (@available (macOS 10.10, *))
+        return (AccessibilityNativeHandle*) nativeImpl->getAccessibilityElement();
+
+    return nullptr;
 }
 
 static bool areAnyAccessibilityClientsActive()
@@ -866,12 +872,15 @@ static void sendHandlerNotification (const AccessibilityHandler& handler,
     if (! areAnyAccessibilityClientsActive() || notification == NSAccessibilityNotificationName{})
         return;
 
-    if (id accessibilityElement = (id) handler.getNativeImplementation())
+    if (@available (macOS 10.9, *))
     {
-        sendAccessibilityEvent (accessibilityElement, notification,
-                                (notification == NSAccessibilityLayoutChangedNotification
-                                   ? @{ NSAccessibilityUIElementsKey: @[ accessibilityElement ] }
-                                   : nil));
+        if (id accessibilityElement = (id) handler.getNativeImplementation())
+        {
+            sendAccessibilityEvent (accessibilityElement, notification,
+                                    (notification == NSAccessibilityLayoutChangedNotification
+                                         ? @{ NSAccessibilityUIElementsKey: @[ accessibilityElement ] }
+                                         : nil));
+        }
     }
 }
 
@@ -930,10 +939,13 @@ void AccessibilityHandler::postAnnouncement (const String& announcementString, A
     if (! areAnyAccessibilityClientsActive())
         return;
 
-     if (@available (macOS 10.10, *))
-     {
+    if (@available (macOS 10.9, *))
+    {
         auto nsPriority = [priority]
         {
+            // The below doesn't get noticed by the @available check above
+            JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wunguarded-availability")
+
             switch (priority)
             {
                 case AnnouncementPriority::low:    return NSAccessibilityPriorityLow;
@@ -943,6 +955,8 @@ void AccessibilityHandler::postAnnouncement (const String& announcementString, A
 
             jassertfalse;
             return NSAccessibilityPriorityLow;
+
+            JUCE_END_IGNORE_WARNINGS_GCC_LIKE
         }();
 
         sendAccessibilityEvent ((id) [NSApp mainWindow],
@@ -952,6 +966,4 @@ void AccessibilityHandler::postAnnouncement (const String& announcementString, A
      }
 }
 
-JUCE_END_IGNORE_WARNINGS_GCC_LIKE
-
 } // namespace juce

modules/juce_gui_basics/native/juce_mac_FileChooser.mm

@@ -105,10 +105,13 @@ public:
             preview->addToDesktop (0, (void*) nsViewPreview);
             preview->setVisible (true);
 
-            if (! isSave)
+            if (@available (macOS 10.11, *))
             {
-                auto* openPanel = static_cast<NSOpenPanel*> (panel);
-                [openPanel setAccessoryViewDisclosed: YES];
+                if (! isSave)
+                {
+                    auto* openPanel = static_cast<NSOpenPanel*> (panel);
+                    [openPanel setAccessoryViewDisclosed: YES];
+                }
             }
         }
 

modules/juce_gui_basics/native/juce_mac_NSViewComponentPeer.mm

@@ -1848,10 +1848,13 @@ private:
 
     void setFullScreenSizeConstraints (const ComponentBoundsConstrainer& c)
     {
-        const auto minSize = NSMakeSize (static_cast<float> (c.getMinimumWidth()),
-                                         0.0f);
-        [window setMinFullScreenContentSize: minSize];
-        [window setMaxFullScreenContentSize: NSMakeSize (100000, 100000)];
+        if (@available (macOS 10.11, *))
+        {
+            const auto minSize = NSMakeSize (static_cast<float> (c.getMinimumWidth()),
+                                             0.0f);
+            [window setMinFullScreenContentSize: minSize];
+            [window setMaxFullScreenContentSize: NSMakeSize (100000, 100000)];
+        }
     }
 
     //==============================================================================

modules/juce_gui_extra/native/juce_mac_SystemTrayIcon.cpp

@@ -19,7 +19,7 @@
 namespace juce
 {
 
-JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wunguarded-availability", "-Wunguarded-availability-new", "-Wdeprecated-declarations")
+JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wdeprecated-declarations")
 
 extern NSMenu* createNSMenu (const PopupMenu&, const String& name, int topLevelMenuId,
                              int topLevelIndex, bool addDelegate);
@@ -80,7 +80,7 @@ struct StatusItemContainer   : public Timer
 };
 
 //==============================================================================
-struct ButtonBasedStatusItem   : public StatusItemContainer
+struct API_AVAILABLE (macos (10.10)) ButtonBasedStatusItem : public StatusItemContainer
 {
     //==============================================================================
     ButtonBasedStatusItem (SystemTrayIconComponent& iconComp, const Image& im)
@@ -377,7 +377,7 @@ public:
     //==============================================================================
     Pimpl (SystemTrayIconComponent& iconComp, const Image& im)
     {
-        if (std::floor (NSFoundationVersionNumber) > NSFoundationVersionNumber10_10)
+        if (@available (macOS 10.10, *))
             statusItemHolder = std::make_unique<ButtonBasedStatusItem> (iconComp, im);
         else
             statusItemHolder = std::make_unique<ViewBasedStatusItem> (iconComp, im);

modules/juce_gui_extra/native/juce_mac_WebBrowserComponent.mm

@@ -25,7 +25,7 @@ namespace juce
 
 static NSURL* appendParametersToFileURL (const URL& url, NSURL* fileUrl)
 {
-    if (@available (macOS 10.9, *))
+    if (@available (macOS 10.10, *))
     {
         const auto parameterNames = url.getParameterNames();
         const auto parameterValues = url.getParameterValues();
@@ -256,7 +256,7 @@ private:
 JUCE_END_IGNORE_WARNINGS_GCC_LIKE
 #endif
 
-struct WebViewDelegateClass  : public ObjCClass<NSObject>
+struct API_AVAILABLE (macos (10.10)) WebViewDelegateClass  : public ObjCClass<NSObject>
 {
     WebViewDelegateClass()  : ObjCClass<NSObject> ("JUCEWebViewDelegate_")
     {
@@ -332,7 +332,7 @@ private:
     }
 
    #if WKWEBVIEW_OPENPANEL_SUPPORTED
-    JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wunguarded-availability", "-Wunguarded-availability-new")
+    API_AVAILABLE (macos (10.12))
     static void runOpenPanel (id, SEL, WKWebView*, WKOpenPanelParameters* parameters, WKFrameInfo*,
                               void (^completionHandler)(NSArray<NSURL*>*))
     {
@@ -395,7 +395,6 @@ private:
             delete wrapper;
         });
     }
-    JUCE_END_IGNORE_WARNINGS_GCC_LIKE
    #endif
 };
 
@@ -500,7 +499,7 @@ private:
 JUCE_END_IGNORE_WARNINGS_GCC_LIKE
 #endif
 
-class WKWebViewImpl  : public WebViewBase
+class API_AVAILABLE (macos (10.11)) WKWebViewImpl : public WebViewBase
 {
 public:
     WKWebViewImpl (WebBrowserComponent* owner)
@@ -580,7 +579,7 @@ class WebBrowserComponent::Pimpl
 public:
     Pimpl (WebBrowserComponent* owner)
     {
-        if (@available (macOS 10.10, *))
+        if (@available (macOS 10.11, *))
             webView = std::make_unique<WKWebViewImpl> (owner);
        #if JUCE_MAC
         else

modules/juce_video/capture/juce_CameraDevice.cpp

@@ -24,11 +24,7 @@ namespace juce
 #elif JUCE_WINDOWS
  #include "../native/juce_win32_CameraDevice.h"
 #elif JUCE_IOS
- JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wunguarded-availability", "-Wunguarded-availability-new")
-
  #include "../native/juce_ios_CameraDevice.h"
-
- JUCE_END_IGNORE_WARNINGS_GCC_LIKE
 #elif JUCE_ANDROID
  #include "../native/juce_android_CameraDevice.h"
 #endif

modules/juce_video/native/juce_ios_CameraDevice.h

@@ -759,7 +759,7 @@ private:
 
             //==============================================================================
            #if JUCE_USE_NEW_CAMERA_API
-            class PhotoOutputDelegateClass : public ObjCClass<NSObject>
+            class API_AVAILABLE (ios (10.0)) PhotoOutputDelegateClass : public ObjCClass<NSObject>
             {
             public:
                 PhotoOutputDelegateClass() : ObjCClass<NSObject> ("PhotoOutputDelegateClass_")
@@ -813,6 +813,7 @@ private:
                     JUCE_CAMERA_LOG ("didFinishCaptureForSettings(), error = " + errorString);
                 }
 
+                API_AVAILABLE (ios (11.0))
                 static void didFinishProcessingPhoto (id self, SEL, AVCapturePhotoOutput*, AVCapturePhoto* capturePhoto, NSError* error)
                 {
                     getOwner (self).takingPicture = false;

modules/juce_video/native/juce_mac_CameraDevice.h

@@ -219,7 +219,7 @@ private:
         {
             JUCE_CAMERA_LOG (nsStringToJuce ([notification description]));
 
-            NSError* error = notification.userInfo[AVCaptureSessionErrorKey];
+            NSError* error = [notification.userInfo objectForKey: AVCaptureSessionErrorKey];
             auto errorString = error != nil ? nsStringToJuce (error.localizedDescription) : String();
             getOwner (self).cameraSessionRuntimeError (errorString);
         }
@@ -237,8 +237,7 @@ private:
     };
 
    #if JUCE_USE_NEW_CAMERA_API
-    JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wunguarded-availability", "-Wunguarded-availability-new")
-    class PostCatalinaPhotoOutput  : public ImageOutputBase
+    class API_AVAILABLE (macos (10.15)) PostCatalinaPhotoOutput  : public ImageOutputBase
     {
     public:
         PostCatalinaPhotoOutput()
@@ -322,7 +321,6 @@ private:
         AVCapturePhotoOutput* imageOutput = nil;
         std::unique_ptr<NSObject, NSObjectDeleter> delegate;
     };
-    JUCE_END_IGNORE_WARNINGS_GCC_LIKE
    #endif
 
     JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wdeprecated-declarations")

modules/juce_video/native/juce_mac_Video.h

@@ -188,8 +188,15 @@ private:
     public:
         ~PlayerControllerBase()
         {
-            detachPlayerStatusObserver();
-            detachPlaybackObserver();
+            // Derived classes must call detachPlayerStatusObserver() before destruction!
+            jassert (! playerStatusObserverAttached);
+
+            // Derived classes must call detachPlaybackObserver() before destruction!
+            jassert (! playbackObserverAttached);
+
+            // Note that it's unsafe to call detachPlayerStatusObserver and detachPlaybackObserver
+            // directly here, because those functions call into the derived class, which will have
+            // been destroyed at this point.
         }
 
     protected:
@@ -219,8 +226,8 @@ private:
 
                 if ([keyPath isEqualToString: nsStringLiteral ("rate")])
                 {
-                    auto oldRate = [change[NSKeyValueChangeOldKey] floatValue];
-                    auto newRate = [change[NSKeyValueChangeNewKey] floatValue];
+                    auto oldRate = [[change objectForKey: NSKeyValueChangeOldKey] floatValue];
+                    auto newRate = [[change objectForKey: NSKeyValueChangeNewKey] floatValue];
 
                     if (oldRate == 0 && newRate != 0)
                         owner.playbackStarted();
@@ -229,7 +236,7 @@ private:
                 }
                 else if ([keyPath isEqualToString: nsStringLiteral ("status")])
                 {
-                    auto status = [change[NSKeyValueChangeNewKey] intValue];
+                    auto status = [[change objectForKey: NSKeyValueChangeNewKey] intValue];
 
                     if (status == AVPlayerStatusFailed)
                         owner.errorOccurred();
@@ -322,8 +329,8 @@ private:
                         auto* urlAsset = (AVURLAsset*) playerItem.asset;
 
                         URL url (nsStringToJuce (urlAsset.URL.absoluteString));
-                        auto oldStatus = [change[NSKeyValueChangeOldKey] intValue];
-                        auto newStatus = [change[NSKeyValueChangeNewKey] intValue];
+                        auto oldStatus = [[change objectForKey: NSKeyValueChangeOldKey] intValue];
+                        auto newStatus = [[change objectForKey: NSKeyValueChangeNewKey] intValue];
 
                         // Ignore spurious notifications
                         if (oldStatus == newStatus)
@@ -474,6 +481,8 @@ private:
                                  forKeyPath: nsStringLiteral ("status")
                                     options: NSKeyValueObservingOptionNew
                                     context: this];
+
+            playerStatusObserverAttached = true;
         }
 
         void detachPlayerStatusObserver()
@@ -488,6 +497,8 @@ private:
                                         forKeyPath: nsStringLiteral ("status")
                                            context: this];
             }
+
+            playerStatusObserverAttached = false;
         }
 
         void attachPlaybackObserver()
@@ -498,6 +509,8 @@ private:
                                                          name: AVPlayerItemDidPlayToEndTimeNotification
                                                        object: [crtp().getPlayer() currentItem]];
             JUCE_END_IGNORE_WARNINGS_GCC_LIKE
+
+            playbackObserverAttached = true;
         }
 
         void detachPlaybackObserver()
@@ -505,6 +518,8 @@ private:
             JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wundeclared-selector")
             [[NSNotificationCenter defaultCenter] removeObserver: playerItemPlaybackStatusObserver.get()];
             JUCE_END_IGNORE_WARNINGS_GCC_LIKE
+
+            playbackObserverAttached = false;
         }
 
     private:
@@ -549,6 +564,8 @@ private:
             owner.playbackStopped();
         }
 
+        bool playerStatusObserverAttached = false, playbackObserverAttached = false;
+
         JUCE_DECLARE_WEAK_REFERENCEABLE (PlayerControllerBase)
     };
 
@@ -565,38 +582,21 @@ private:
             useNativeControls = false;
            #endif
 
-            if (useNativeControls)
+            wrappedPlayer = [&]() -> std::unique_ptr<WrappedPlayer>
             {
                #if ! JUCE_32BIT
-                playerView = [[AVPlayerView alloc] init];
+                if (@available (macOS 10.9, *))
+                    if (useNativeControls)
+                        return std::make_unique<WrappedPlayerView>();
                #endif
-            }
-            else
-            {
-                view = [[NSView alloc] init];
-                playerLayer = [[AVPlayerLayer alloc] init];
-                [view setLayer: playerLayer];
-            }
-        }
 
-        ~PlayerController()
-        {
-           #if JUCE_32BIT
-            [view release];
-            [playerLayer release];
-           #else
-            [playerView release];
-           #endif
+                return std::make_unique<WrappedPlayerLayer> ();
+            }();
         }
 
         NSView* getView()
         {
-           #if ! JUCE_32BIT
-            if (useNativeControls)
-                return playerView;
-           #endif
-
-            return view;
+            return wrappedPlayer->getView();
         }
 
         Result load (NSURL* url)
@@ -622,12 +622,7 @@ private:
             detachPlayerStatusObserver();
             detachPlaybackObserver();
 
-           #if ! JUCE_32BIT
-            if (useNativeControls)
-                [playerView setPlayer: player];
-            else
-           #endif
-                [playerLayer setPlayer: player];
+            wrappedPlayer->setPlayer (player);
 
             if (player != nil)
             {
@@ -638,21 +633,46 @@ private:
 
         AVPlayer* getPlayer() const
         {
-           #if ! JUCE_32BIT
-            if (useNativeControls)
-                return [playerView player];
-           #endif
-
-            return [playerLayer player];
+            return wrappedPlayer->getPlayer();
         }
 
     private:
-        NSView* view = nil;
-        AVPlayerLayer* playerLayer = nil;
+        struct WrappedPlayer
+        {
+            virtual ~WrappedPlayer() = default;
+            virtual NSView* getView() const = 0;
+            virtual AVPlayer* getPlayer() const = 0;
+            virtual void setPlayer (AVPlayer*) = 0;
+        };
+
+        class WrappedPlayerLayer : public WrappedPlayer
+        {
+        public:
+            WrappedPlayerLayer ()                       { [view.get() setLayer: playerLayer.get()]; }
+            NSView* getView() const override            { return view.get(); }
+            AVPlayer* getPlayer() const override        { return [playerLayer.get() player]; }
+            void setPlayer (AVPlayer* player) override  { [playerLayer.get() setPlayer: player]; }
+
+        private:
+            NSUniquePtr<NSView> view                    { [[NSView alloc] init] };
+            NSUniquePtr<AVPlayerLayer> playerLayer      { [[AVPlayerLayer alloc] init] };
+        };
+
        #if ! JUCE_32BIT
-        // 32-bit builds don't have AVPlayerView
-        AVPlayerView* playerView = nil;
+        class API_AVAILABLE (macos (10.9)) WrappedPlayerView : public WrappedPlayer
+        {
+        public:
+            WrappedPlayerView() = default;
+            NSView* getView() const override            { return playerView.get(); }
+            AVPlayer* getPlayer() const override        { return [playerView.get() player]; }
+            void setPlayer (AVPlayer* player) override  { [playerView.get() setPlayer: player]; }
+
+        private:
+            NSUniquePtr<AVPlayerView> playerView        { [[AVPlayerView alloc] init] };
+        };
        #endif
+
+        std::unique_ptr<WrappedPlayer> wrappedPlayer;
     };
    #else
     //==============================================================================
@@ -709,13 +729,19 @@ private:
 
         void setPlayer (AVPlayer* playerToUse)
         {
+            detachPlayerStatusObserver();
+            detachPlaybackObserver();
+
             if (useNativeControls)
                 [playerViewController.get() setPlayer: playerToUse];
             else
                 [playerLayer.get() setPlayer: playerToUse];
 
-            attachPlayerStatusObserver();
-            attachPlaybackObserver();
+            if (playerToUse != nil)
+            {
+                attachPlayerStatusObserver();
+                attachPlaybackObserver();
+            }
         }
 
     private: