fun with quicktime:

#include <QuickTime/Movies.h> instead of #include <Movies.h> on OS X to
avoid having to specify the full path to the QT headers in the Makefiles

#undef NDEBUG on OS X to avoid errors about ID being declared twice

enable support for QuickTime in the original Makefiles on OS X

source/blender/quicktime/quicktime_import.h

@@ -44,7 +44,11 @@
 #include "../imbuf/IMB_imbuf_types.h"
 
 #ifndef __MOVIES__
+#ifdef _WIN32
 #include <Movies.h>
+#elif defined(__APPLE__)
+#include <QuickTime/Movies.h>
+#endif
 #endif
 
 #ifdef _WIN32