Cocoa: Fix deprecation of kIOMasterPortDefault

This adds a workaround for kIOMasterPortDefault having been deprecated
in favor of kIOMainPortDefault in macOS 12.0.

Closes #1980

src/cocoa_monitor.m

@@ -58,7 +58,7 @@ static char* getMonitorName(CGDirectDisplayID displayID, NSScreen* screen)
     io_service_t service;
     CFDictionaryRef info;
 
-    if (IOServiceGetMatchingServices(kIOMasterPortDefault,
+    if (IOServiceGetMatchingServices(kIOMainPortDefault,
                                      IOServiceMatching("IODisplayConnect"),
                                      &it) != 0)
     {
@@ -231,7 +231,7 @@ static double getFallbackRefreshRate(CGDirectDisplayID displayID)
     io_iterator_t it;
     io_service_t service;
 
-    if (IOServiceGetMatchingServices(kIOMasterPortDefault,
+    if (IOServiceGetMatchingServices(kIOMainPortDefault,
                                      IOServiceMatching("IOFramebuffer"),
                                      &it) != 0)
     {

src/cocoa_platform.h

@@ -41,6 +41,13 @@
 typedef void* id;
 #endif
 
+// NOTE: Many Cocoa enum values have been renamed and we need to build across
+//       SDK versions where one is unavailable or the other deprecated
+//       We use the newer names in code and these macros to handle compatibility
+#if MAC_OS_X_VERSION_MAX_ALLOWED < 120000
+ #define kIOMainPortDefault kIOMasterPortDefault
+#endif
+
 // NOTE: Many Cocoa enum values have been renamed and we need to build across
 //       SDK versions where one is unavailable or the other deprecated
 //       We use the newer names in code and these macros to handle compatibility