Fix build against newer macOS versions

data/macos/build-deps.sh

@@ -378,6 +378,8 @@ if [ ! -f qtbase-opensource-src-${QT5_VERSION}/build-done ]; then
     if [ ! -f carla-patched ]; then
       sed -i -e "s|PNG_WARNINGS_SUPPORTED|PNG_WARNINGS_NOT_SUPPORTED|" src/3rdparty/libpng/pnglibconf.h
       sed -i -e "s|AWK=.*|AWK=/opt/local/bin/gawk|" configure
+      sed -i -e "s|/usr/bin/xcrun -find xcrun|true|" configure
+      sed -i -e "s|/usr/bin/xcrun -find xcrun|echo hello|" mkspecs/features/mac/default_pre.prf
       patch -p1 -i ../patches/qt55-newosx-fix.patch
       touch carla-patched
     fi

data/macos/patches/qt55-newosx-fix.patch

@@ -69,3 +69,16 @@ index cd73148..3f8429e 100644
 -- 
 2.7.4
 
+diff --git a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
+index 7e1dfd9..674c037 100644
+--- a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
++++ b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
+@@ -736,7 +736,7 @@ void QCoreTextFontEngine::getUnscaledGlyph(glyph_t glyph, QPainterPath *path, gl
+ 
+ QFixed QCoreTextFontEngine::emSquareSize() const
+ {
+-    return QFixed::QFixed(int(CTFontGetUnitsPerEm(ctfont)));
++    return QFixed(int(CTFontGetUnitsPerEm(ctfont)));
+ }
+ 
+ QFontEngine *QCoreTextFontEngine::cloneWithSize(qreal pixelSize) const

source/utils/CarlaMacUtils.cpp

@@ -40,7 +40,7 @@ const char* findBinaryInBundle(const char* const bundleDir)
     const CFURLRef absoluteURL = CFURLCopyAbsoluteURL(exeRef);
     CARLA_SAFE_ASSERT_RETURN(absoluteURL != nullptr, nullptr);
 
-    const NSString* strRef = (NSString*)CFURLCopyFileSystemPath(absoluteURL, nil);
+    const NSString* strRef = (NSString*)CFURLCopyFileSystemPath(absoluteURL, kCFURLPOSIXPathStyle);
     CARLA_SAFE_ASSERT_RETURN(strRef != nullptr, nullptr);
 
     static CarlaString ret;