diff --git a/macosx/mac-render.mm b/macosx/mac-render.mm
index 71d57b7e..80b921b2 100644
--- a/macosx/mac-render.mm
+++ b/macosx/mac-render.mm
@@ -38,11 +38,6 @@ static void S9xInitMetal (void);
 static void S9xDeinitMetal(void);
 static void S9xPutImageMetal (int, int, uint16 *);
 
-static uint16				*gfxScreen[2],
-							*snesScreenA,
-							*snesScreenB;
-static uint8				*blitGLBuffer;
-
 static int					whichBuf          = 0;
 static int					textureNum        = 0;
 static int					prevBlitWidth, prevBlitHeight;
@@ -75,21 +70,6 @@ id<MTLRenderPipelineState>	metalPipelineState = nil;
 
 void InitGraphics (void)
 {
-	int	safemarginbytes = (520 * 520 - 512 * 512) * 2;
-
-	snesScreenA  = (uint16 *) calloc( 520 *  520 * 2, 1);
-	snesScreenB  = (uint16 *) calloc( 520 *  520 * 2, 1);
-	blitGLBuffer = (uint8  *) calloc(1024 * 1024 * 2, 1);
-
-	gfxScreen[0] = snesScreenA + (safemarginbytes >> 2);
-	gfxScreen[1] = snesScreenB + (safemarginbytes >> 2);
-
-	GFX.Pitch    = 512 * 2;
-	GFX.Screen   = gfxScreen[0];
-
-	if (!snesScreenA || !snesScreenB || !blitGLBuffer)
-		QuitWithFatalError(@"render 01");
-
 	if (!S9xBlitFilterInit()      |
 		!S9xBlit2xSaIFilterInit() |
 		!S9xBlitHQ2xFilterInit()  |
@@ -127,24 +107,6 @@ void DeinitGraphics (void)
 	S9xBlitHQ2xFilterDeinit();
 	S9xBlit2xSaIFilterDeinit();
 	S9xBlitFilterDeinit();
-
-	if (snesScreenA)
-	{
-		free(snesScreenA);
-		snesScreenA  = NULL;
-	}
-
-	if (snesScreenB)
-	{
-		free(snesScreenB);
-		snesScreenB  = NULL;
-	}
-
-	if (blitGLBuffer)
-	{
-		free(blitGLBuffer);
-		blitGLBuffer = NULL;
-	}
 }
 
 void DrawFreezeDefrostScreen (uint8 *draw)
@@ -210,7 +172,6 @@ void S9xInitDisplay (int argc, char **argv)
 	imageWidth[0] = imageHeight[0] = 0;
 	imageWidth[1] = imageHeight[1] = 0;
 	prevBlitWidth = prevBlitHeight = 0;
-	GFX.Screen    = gfxScreen[0];
 	whichBuf      = 0;
 	textureNum    = 0;
 
@@ -310,7 +271,14 @@ void S9xPutImage (int width, int height)
 
 static void S9xPutImageMetal (int width, int height, uint16 *buffer16)
 {
-	uint8 *buffer = (uint8 *)malloc(width * height * 4);
+	static uint8 *buffer = nil;
+	static int buffer_size = 0;
+
+	if (buffer_size != width * height * 4)
+	{
+		buffer = realloc(buffer, width * height * 4);
+	}
+
 	for (int i = 0; i < width * height; ++i)
 	{
 		uint16 pixel = buffer16[i];
@@ -339,7 +307,6 @@ static void S9xPutImageMetal (int width, int height, uint16 *buffer16)
 	metalTexture = [metalDevice newTextureWithDescriptor:textureDescriptor];
 	
 	[metalTexture replaceRegion:MTLRegionMake2D(0, 0, width, height) mipmapLevel:0 withBytes:buffer bytesPerRow:width * 4];
-	free(buffer);
 	
 	float vWidth = layerSize.width / 2.0;
 	float vHeight = layerSize.height / 2.0;