+#if TARGET_API_MAC_OSX
+ HIViewRef growBoxRef = 0 ;
+ OSStatus err = HIViewFindByID( HIViewGetRoot( (WindowRef)m_macWindow ), kHIViewWindowGrowBoxID, &growBoxRef );
+ if ( err == noErr && growBoxRef != 0 )
+ HIGrowBoxViewSetTransparent( growBoxRef, true ) ;
+#endif
+
+ return true;