diff --git a/distrho/DistrhoUtils.hpp b/distrho/DistrhoUtils.hpp
index c842798a..bdd367a2 100644
--- a/distrho/DistrhoUtils.hpp
+++ b/distrho/DistrhoUtils.hpp
@@ -38,7 +38,7 @@
 typedef SSIZE_T ssize_t;
 #endif
 
-#if ! defined(CARLA_MATH_UTILS_HPP_INCLUDED) && ! defined(DISTRHO_PROPER_CPP11_SUPPORT)
+#if ! defined(CARLA_MATH_UTILS_HPP_INCLUDED) && ! defined(DISTRHO_PROPER_CPP11_SUPPORT) && ! defined(DISTRHO_OS_MAC)
 namespace std {
 inline float fmin(float __x, float __y)
   { return __builtin_fminf(__x, __y); }
diff --git a/distrho/extra/WebViewImpl.cpp b/distrho/extra/WebViewImpl.cpp
index fcca8fb4..b9edc238 100644
--- a/distrho/extra/WebViewImpl.cpp
+++ b/distrho/extra/WebViewImpl.cpp
@@ -313,10 +313,10 @@ struct WebViewData {
    #if WEB_VIEW_USING_CHOC
     choc::ui::WebView* const webview;
    #elif WEB_VIEW_USING_MACOS_WEBKIT
-    NSView* const view;
-    WKWebView* const webview;
-    NSURLRequest* const urlreq;
-    WEB_VIEW_DELEGATE_CLASS_NAME* const delegate;
+    NSView* view;
+    WKWebView* webview;
+    NSURLRequest* urlreq;
+    WEB_VIEW_DELEGATE_CLASS_NAME* delegate;
    #elif WEB_VIEW_USING_X11_IPC
     int shmfd = 0;
     char shmname[128] = {};
@@ -329,6 +329,8 @@ struct WebViewData {
     ::Window childWindow = 0;
     ::Window ourWindow = 0;
    #endif
+    WebViewData() {}
+    DISTRHO_DECLARE_NON_COPYABLE(WebViewData);
 };
 
 // -----------------------------------------------------------------------------------------------------------
@@ -549,7 +551,12 @@ WebViewHandle webViewCreate(const uintptr_t windowId,
     [config release];
     [prefs release];
 
-    return new WebViewData{options.callback, view, webview, urlreq, delegate};
+    WebViewData* const handle = new WebViewData;
+    handle->view = view;
+    handle->webview = webview;
+    handle->urlreq = urlreq;
+    handle->delegate = delegate;
+    return handle;
 #elif WEB_VIEW_USING_X11_IPC
     // get startup paths
     char ldlinux[PATH_MAX] = {};
@@ -759,7 +766,7 @@ void webViewEvaluateJS(const WebViewHandle handle, const char* const js)
     NSString* const nsjs = [[NSString alloc] initWithBytes:js
                                                     length:std::strlen(js)
                                                   encoding:NSUTF8StringEncoding];
-    [handle->webview evaluateJavaScript:nsjs completionHandler:nullptr];
+    [handle->webview evaluateJavaScript:nsjs completionHandler:nil];
     [nsjs release];
    #elif WEB_VIEW_USING_X11_IPC
     d_debug("evaluateJS '%s'", js);
diff --git a/distrho/src/DistrhoPluginAU.cpp b/distrho/src/DistrhoPluginAU.cpp
index fad29b37..0f5168b7 100644
--- a/distrho/src/DistrhoPluginAU.cpp
+++ b/distrho/src/DistrhoPluginAU.cpp
@@ -119,7 +119,8 @@ static const char* AudioUnitPropertyID2Str(const AudioUnitPropertyID prop) noexc
     PROP(kMusicDeviceProperty_DualSchedulingMode)
     #undef PROP
     // DPF specific properties
-    #define PROP(s) case d_cconst(#s): return #s;
+    #define PROPX(s) (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | (s[3] << 0)
+    #define PROP(s) case PROPX(#s): return #s;
     PROP(DPFi)
     PROP(DPFe)
     PROP(DPFp)
@@ -129,6 +130,7 @@ static const char* AudioUnitPropertyID2Str(const AudioUnitPropertyID prop) noexc
     PROP(DPFs)
     PROP(DPFa)
     #undef PROP
+    #undef PROPX
     }
     return "[unknown]";
 }
diff --git a/distrho/src/DistrhoPluginLV2.cpp b/distrho/src/DistrhoPluginLV2.cpp
index df7783ae..d2791951 100644
--- a/distrho/src/DistrhoPluginLV2.cpp
+++ b/distrho/src/DistrhoPluginLV2.cpp
@@ -590,7 +590,7 @@ public:
 
                 const LV2_Atom* property = nullptr;
                 const LV2_Atom* value    = nullptr;
-                lv2_atom_object_get(object, fURIDs.patchProperty, &property, fURIDs.patchValue, &value, nullptr);
+                lv2_atom_object_get(object, fURIDs.patchProperty, &property, fURIDs.patchValue, &value, 0);
 
                 if (property != nullptr && property->type == fURIDs.atomURID &&
                     value != nullptr && (value->type == fURIDs.atomPath || value->type == fURIDs.atomString))
@@ -1122,7 +1122,7 @@ public:
 
             const LV2_Atom* property = nullptr;
             const LV2_Atom* value    = nullptr;
-            lv2_atom_object_get(object, fURIDs.patchProperty, &property, fURIDs.patchValue, &value, nullptr);
+            lv2_atom_object_get(object, fURIDs.patchProperty, &property, fURIDs.patchValue, &value, 0);
             DISTRHO_SAFE_ASSERT_RETURN(property != nullptr, LV2_WORKER_ERR_UNKNOWN);
             DISTRHO_SAFE_ASSERT_RETURN(property->type == fURIDs.atomURID, LV2_WORKER_ERR_UNKNOWN);
             DISTRHO_SAFE_ASSERT_RETURN(value != nullptr, LV2_WORKER_ERR_UNKNOWN);
diff --git a/distrho/src/DistrhoPluginVST.hpp b/distrho/src/DistrhoPluginVST.hpp
index 9164b410..fa7f7cd9 100644
--- a/distrho/src/DistrhoPluginVST.hpp
+++ b/distrho/src/DistrhoPluginVST.hpp
@@ -45,7 +45,7 @@
 
 // --------------------------------------------------------------------------------------------------------------------
 
-#ifdef DISTRHO_PROPER_CPP11_SUPPORT
+#if defined(DISTRHO_PROPER_CPP11_SUPPORT) || defined(DISTRHO_OS_MAC)
 # include <atomic>
 #else
 // quick and dirty std::atomic replacement for the things we need
diff --git a/distrho/src/jackbridge/NativeBridge.hpp b/distrho/src/jackbridge/NativeBridge.hpp
index ac969544..33793e8d 100644
--- a/distrho/src/jackbridge/NativeBridge.hpp
+++ b/distrho/src/jackbridge/NativeBridge.hpp
@@ -49,10 +49,10 @@ struct NativeBridge {
     uint numMidiOuts;
 
     // JACK callbacks
-    JackProcessCallback jackProcessCallback = nullptr;
-    JackBufferSizeCallback bufferSizeCallback = nullptr;
-    void* jackProcessArg = nullptr;
-    void* jackBufferSizeArg = nullptr;
+    JackProcessCallback jackProcessCallback;
+    JackBufferSizeCallback bufferSizeCallback;
+    void* jackProcessArg;
+    void* jackBufferSizeArg;
 
     // Runtime buffers
     enum PortMask {
diff --git a/examples/WebMeters/DistrhoPluginInfo.h b/examples/WebMeters/DistrhoPluginInfo.h
index 89a5cfcf..cd6d395e 100644
--- a/examples/WebMeters/DistrhoPluginInfo.h
+++ b/examples/WebMeters/DistrhoPluginInfo.h
@@ -37,8 +37,8 @@
 #define METER_COLOR_GREEN 0
 #define METER_COLOR_BLUE  1
 
-#define DISTRHO_UI_DEFAULT_WIDTH 600
-#define DISTRHO_UI_DEFAULT_HEIGHT 400
+#define DISTRHO_UI_DEFAULT_WIDTH 100
+#define DISTRHO_UI_DEFAULT_HEIGHT 500
 #define kVerticalOffset 0
 
 #endif // DISTRHO_PLUGIN_INFO_H_INCLUDED
diff --git a/examples/WebMeters/ExampleUIWebMeters.cpp b/examples/WebMeters/ExampleUIWebMeters.cpp
index 68daf206..421ab122 100644
--- a/examples/WebMeters/ExampleUIWebMeters.cpp
+++ b/examples/WebMeters/ExampleUIWebMeters.cpp
@@ -24,7 +24,7 @@ class ExampleUIMeters : public UI
 {
 public:
     ExampleUIMeters()
-        : UI(100, 500, false)
+        : UI()
     {
     }