diff --git a/source/backend/plugin/CarlaPluginJack.cpp b/source/backend/plugin/CarlaPluginJack.cpp
index c95892055..b4e5b2627 100644
--- a/source/backend/plugin/CarlaPluginJack.cpp
+++ b/source/backend/plugin/CarlaPluginJack.cpp
@@ -18,7 +18,7 @@
 #include "CarlaPluginInternal.hpp"
 #include "CarlaEngine.hpp"
 
-#ifdef CARLA_OS_LINUX
+#if defined(CARLA_OS_LINUX) || defined(CARLA_OS_MAC)
 
 #include "CarlaLibJackHints.h"
 #include "CarlaBackendUtils.hpp"
@@ -142,14 +142,20 @@ public:
     {
         const EngineOptions& options(kEngine->getOptions());
         CarlaString binaryDir(options.binaryDir);
-#ifdef HAVE_LIBLO
+       #ifdef HAVE_LIBLO
         const int sessionManager = fSetupLabel[4U] - '0';
-#endif
+       #endif
 
         CarlaString ret;
+       #ifdef CARLA_OS_MAC
+        ret += "export DYLD_LIBRARY_PATH=" + binaryDir + "/jack\n";
+        ret += "export DYLD_INSERT_LIBRARIES=" + binaryDir + "/libcarla_interposer-jack-x11.dylib\n";
+        ret += "export DYLD_FORCE_FLAT_NAMESPACE=1\n";
+       #else
         ret += "export LD_LIBRARY_PATH=" + binaryDir + "/jack\n";
         ret += "export LD_PRELOAD=" + binaryDir + "/libcarla_interposer-jack-x11.so\n";
-#ifdef HAVE_LIBLO
+       #endif
+       #ifdef HAVE_LIBLO
         if (sessionManager == LIBJACK_SESSION_MANAGER_NSM)
         {
             for (int i=50; fOscServer == nullptr && --i>=0;)
@@ -159,7 +165,7 @@ public:
             ret += lo_server_get_url(fOscServer);
             ret += "\n";
         }
-#endif
+       #endif
 
         if (kPlugin->getHints() & PLUGIN_HAS_CUSTOM_UI)
             ret += "export CARLA_FRONTEND_WIN_ID=" + CarlaString(options.frontendWinId) + "\n";
@@ -362,15 +368,25 @@ protected:
             winIdStr[STR_MAX] = '\0';
 
             const CarlaString libjackdir(CarlaString(options.binaryDir) + "/jack");
+           #ifdef CARLA_OS_MAC
+            const CarlaString ldpreload(CarlaString(options.binaryDir) + "/libcarla_interposer-jack-x11.dylib");
+           #else
             const CarlaString ldpreload(CarlaString(options.binaryDir) + "/libcarla_interposer-jack-x11.so");
+           #endif
 
             const ScopedEngineEnvironmentLocker _seel(kEngine);
 
+           #ifdef CARLA_OS_MAC
+            const CarlaScopedEnvVar sev2("DYLD_LIBRARY_PATH", libjackdir.buffer());
+            const CarlaScopedEnvVar sev1("DYLD_INSERT_LIBRARIES", ldpreload.isNotEmpty() ? ldpreload.buffer() : nullptr);
+            const CarlaScopedEnvVar sev0("DYLD_FORCE_FLAT_NAMESPACE", "1");
+           #else
             const CarlaScopedEnvVar sev2("LD_LIBRARY_PATH", libjackdir.buffer());
             const CarlaScopedEnvVar sev1("LD_PRELOAD", ldpreload.isNotEmpty() ? ldpreload.buffer() : nullptr);
-#ifdef HAVE_LIBLO
+           #endif
+           #ifdef HAVE_LIBLO
             const CarlaScopedEnvVar sev3("NSM_URL", lo_server_get_url(fOscServer));
-#endif
+           #endif
 
             if (kPlugin->getHints() & PLUGIN_HAS_CUSTOM_UI)
                 carla_setenv("CARLA_FRONTEND_WIN_ID", winIdStr);
@@ -2048,7 +2064,7 @@ CarlaPluginPtr CarlaPlugin::newJackApp(const Initializer& init)
     carla_debug("CarlaPlugin::newJackApp({%p, \"%s\", \"%s\", \"%s\"})",
                 init.engine, init.filename, init.name, init.label);
 
-#ifdef CARLA_OS_LINUX
+#if defined(CARLA_OS_LINUX) || defined(CARLA_OS_MAC)
     std::shared_ptr<CarlaPluginJack> plugin(new CarlaPluginJack(init.engine, init.id));
 
     if (! plugin->init(plugin, init.filename, init.name, init.label, init.options))
diff --git a/source/frontend/carla_settings.py b/source/frontend/carla_settings.py
index 4038d3e5b..bd849a38f 100755
--- a/source/frontend/carla_settings.py
+++ b/source/frontend/carla_settings.py
@@ -586,13 +586,15 @@ class CarlaSettingsW(QDialog):
 
         if not LINUX:
             self.ui.ch_exp_wine_bridges.setVisible(False)
-            self.ui.ch_exp_jack_apps.setVisible(False)
             self.ui.ch_exp_prevent_bad_behaviour.setVisible(False)
             self.ui.lw_page.hideRow(self.TAB_INDEX_WINE)
 
         if not MACOS:
             self.ui.label_engine_ui_bridges_mac_note.setVisible(False)
 
+        if not (LINUX or MACOS):
+            self.ui.ch_exp_jack_apps.setVisible(False)
+
         # FIXME, not implemented yet
         self.ui.ch_engine_uis_always_on_top.hide()
 
diff --git a/source/frontend/utils/qsafesettings.cpp b/source/frontend/utils/qsafesettings.cpp
index d1786fb35..04ef6f9ac 100644
--- a/source/frontend/utils/qsafesettings.cpp
+++ b/source/frontend/utils/qsafesettings.cpp
@@ -54,10 +54,12 @@ int QSafeSettings::valueIntPositive(const QString& key, const int defaultValue)
     QVariant var(value(key, defaultValue));
 
     if (!var.isNull() && var.convert(QVariant::Int) && var.isValid())
-        return defaultValue;
+    {
+        const int value = var.toInt();
+        return value >= 0 ? value : defaultValue;
+    }
 
-    const int value = var.toInt();
-    return value >= 0 ? value : defaultValue;
+    return defaultValue;
 }
 
 uint QSafeSettings::valueUInt(const QString& key, const uint defaultValue) const
diff --git a/source/interposer/Makefile b/source/interposer/Makefile
index e6d173ec8..d47d46d0a 100644
--- a/source/interposer/Makefile
+++ b/source/interposer/Makefile
@@ -31,15 +31,15 @@ INTERPOSER_X11_LIBS  = $(X11_LIBS) $(LIBDL_LIBS)
 OBJS    =
 TARGETS =
 
-ifeq ($(LINUX),true)
+ifeq ($(LINUX)$(MACOS),true)
 OBJS    += $(OBJDIR)/interposer-safe.cpp.o
 OBJS    += $(OBJDIR)/interposer-jack-x11.cpp.o
-TARGETS += $(BINDIR)/libcarla_interposer-safe.so
-TARGETS += $(BINDIR)/libcarla_interposer-jack-x11.so
+TARGETS += $(BINDIR)/libcarla_interposer-safe$(LIB_EXT)
+TARGETS += $(BINDIR)/libcarla_interposer-jack-x11$(LIB_EXT)
 
 ifeq ($(HAVE_X11),true)
 OBJS    += $(OBJDIR)/interposer-x11.cpp.o
-TARGETS += $(BINDIR)/libcarla_interposer-x11.so
+TARGETS += $(BINDIR)/libcarla_interposer-x11$(LIB_EXT)
 endif
 endif
 
@@ -57,19 +57,19 @@ debug:
 
 # ---------------------------------------------------------------------------------------------------------------------
 
-$(BINDIR)/libcarla_interposer-safe.so: $(OBJDIR)/interposer-safe.cpp.o
+$(BINDIR)/libcarla_interposer-safe$(LIB_EXT): $(OBJDIR)/interposer-safe.cpp.o
 	-@mkdir -p $(BINDIR)
-	@echo "Linking libcarla_interposer-safe.so"
+	@echo "Linking libcarla_interposer-safe$(LIB_EXT)"
 	$(SILENT)$(CXX) $< $(SHARED) $(LINK_FLAGS) $(INTERPOSER_SAFE_LIBS) -o $@
 
-$(BINDIR)/libcarla_interposer-x11.so: $(OBJDIR)/interposer-x11.cpp.o
+$(BINDIR)/libcarla_interposer-x11$(LIB_EXT): $(OBJDIR)/interposer-x11.cpp.o
 	-@mkdir -p $(BINDIR)
-	@echo "Linking libcarla_interposer-x11.so"
+	@echo "Linking libcarla_interposer-x11$(LIB_EXT)"
 	$(SILENT)$(CXX) $< $(SHARED) $(LINK_FLAGS) $(INTERPOSER_X11_LIBS) -o $@
 
-$(BINDIR)/libcarla_interposer-jack-x11.so: $(OBJDIR)/interposer-jack-x11.cpp.o
+$(BINDIR)/libcarla_interposer-jack-x11$(LIB_EXT): $(OBJDIR)/interposer-jack-x11.cpp.o
 	-@mkdir -p $(BINDIR)
-	@echo "Linking libcarla_interposer-jack-x11.so"
+	@echo "Linking libcarla_interposer-jack-x11$(LIB_EXT)"
 	$(SILENT)$(CXX) $< $(SHARED) $(LINK_FLAGS) $(INTERPOSER_X11_LIBS) -o $@
 
 # ---------------------------------------------------------------------------------------------------------------------
diff --git a/source/interposer/interposer-jack-x11.cpp b/source/interposer/interposer-jack-x11.cpp
index b1b55f2e7..4ec5db6aa 100644
--- a/source/interposer/interposer-jack-x11.cpp
+++ b/source/interposer/interposer-jack-x11.cpp
@@ -31,7 +31,11 @@ struct ScopedLibOpen {
     long long winId;
 
     ScopedLibOpen() noexcept
+       #ifdef CARLA_OS_MAC
+        : handle(dlopen("libjack.dylib", RTLD_NOW|RTLD_LOCAL)),
+       #else
         : handle(dlopen("libjack.so.0", RTLD_NOW|RTLD_LOCAL)),
+       #endif
           winId(-1)
     {
         CARLA_SAFE_ASSERT_RETURN(handle != nullptr,);
diff --git a/source/libjack/Makefile b/source/libjack/Makefile
index ef99518a2..f6945b1de 100644
--- a/source/libjack/Makefile
+++ b/source/libjack/Makefile
@@ -23,11 +23,14 @@ endif
 
 BUILD_C_FLAGS   += -I$(CWD) -I$(CWD)/includes
 BUILD_CXX_FLAGS += -I$(CWD) -I$(CWD)/backend -I$(CWD)/includes -I$(CWD)/utils
-LINK_FLAGS      += -pthread -lrt
+LINK_FLAGS      += -pthread
+ifeq ($(LINUX),true)
+LINK_FLAGS      += -lrt
+endif
 
 # ---------------------------------------------------------------------------------------------------------------------
 
-ifeq ($(LINUX),true)
+ifeq ($(LINUX)$(MACOS),true)
 ifneq ($(JACKBRIDGE_DIRECT),true)
 CAN_BUILD_LIBJACK=true
 endif
@@ -51,7 +54,11 @@ OBJS = \
 	$(OBJDIR)/libjack_time.cpp.o \
 	$(OBJDIR)/libjack_transport.cpp.o \
 	$(OBJDIR)/ringbuffer.c.o
+ifeq ($(MACOS),true)
+TARGET = $(BINDIR)/jack/libjack.dylib
+else
 TARGET = $(BINDIR)/jack/libjack.so.0
+endif
 else
 OBJS =
 TARGET =
@@ -73,7 +80,7 @@ debug:
 
 $(TARGET): $(OBJS)
 	-@mkdir -p $(BINDIR)/jack
-	@echo "Linking libjack.so.0"
+	@echo "Linking libjack"
 	$(SILENT)$(CXX) $^ $(SHARED) $(LINK_FLAGS) $(LIBJACK_LIBS) -o $@
 
 # ---------------------------------------------------------------------------------------------------------------------
diff --git a/source/libjack/libjack.cpp b/source/libjack/libjack.cpp
index c48349c07..851b7e78f 100644
--- a/source/libjack/libjack.cpp
+++ b/source/libjack/libjack.cpp
@@ -21,7 +21,6 @@
 #include "CarlaJuceUtils.hpp"
 
 #include <signal.h>
-#include <sys/prctl.h>
 #include <sys/time.h>
 
 // ---------------------------------------------------------------------------------------------------------------------
diff --git a/source/libjack/libjack_base.cpp b/source/libjack/libjack_base.cpp
index b02dfebda..62055598b 100644
--- a/source/libjack/libjack_base.cpp
+++ b/source/libjack/libjack_base.cpp
@@ -29,8 +29,14 @@ int jack_carla_interposed_action(uint, uint, void*)
         printWarning = false;
         carla_stderr2("Non-exported jack_carla_interposed_action called, this should not happen!!");
         carla_stderr("Printing some info:");
+       #ifdef CARLA_OS_MAC
+        carla_stderr("\tDYLD_LIBRARY_PATH:         '%s'", std::getenv("DYLD_LIBRARY_PATH"));
+        carla_stderr("\tDYLD_INSERT_LIBRARIES:     '%s'", std::getenv("DYLD_INSERT_LIBRARIES"));
+        carla_stderr("\tDYLD_FORCE_FLAT_NAMESPACE: '%s'", std::getenv("DYLD_FORCE_FLAT_NAMESPACE"));
+       #else
         carla_stderr("\tLD_LIBRARY_PATH: '%s'", std::getenv("LD_LIBRARY_PATH"));
         carla_stderr("\tLD_PRELOAD:      '%s'", std::getenv("LD_PRELOAD"));
+       #endif
         std::fflush(stderr);
     }