diff --git a/src/video/cocoa_v.mm b/src/video/cocoa_v.mm
--- a/src/video/cocoa_v.mm
+++ b/src/video/cocoa_v.mm
@@ -69,6 +69,7 @@ extern "C" void HideMenuBar();
 #include "../macros.h"
 #include "../os/macosx/splash.h"
 #include "../variables.h"
+#include "../blitter/blitter.hpp"
 #include "cocoa_v.h"
 #include "cocoa_keys.h"
 
@@ -950,6 +951,10 @@ static void QZ_SetPortAlphaOpaque()
 
 static void QZ_UpdateWindowPalette(uint start, uint count)
 {
+	/* We can only update the palette in 8bpp for now */
+	/* TODO -- We need support for other bpps too! */
+	if (BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth() != 8) return;
+
 	uint i;
 
 	switch (_cocoa_video_data.device_bpp) {