--- src/gui/kernel/qcocoaview_mac.mm.orig	2021-04-22 11:42:11.000000000 -0700
+++ src/gui/kernel/qcocoaview_mac.mm	2021-04-22 11:43:21.000000000 -0700
@@ -997,6 +997,18 @@
     }
 }
 
+#if defined(MAC_OS_X_VERSION_10_12) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_12
+- (void) viewWillDraw
+{
+    if (NSAppKitVersionNumber >= 2022.00) // Big Sur
+    {
+        CALayer* layer = self.layer;
+        layer.contentsFormat = kCAContentsFormatRGBA8Uint;
+    }
+    
+    [super viewWillDraw];
+}
+#endif
 
 // NSTextInput Protocol implementation
 
--- src/gui/kernel/mac.pri.orig	2021-04-22 13:28:24.000000000 -0700
+++ src/gui/kernel/mac.pri	2021-04-22 13:28:54.000000000 -0700
@@ -1,4 +1,4 @@
 !x11:!embedded:!qpa:mac {
-   LIBS_PRIVATE += -framework Carbon -lz
+   LIBS_PRIVATE += -framework QuartzCore -framework Carbon -lz
    *-mwerks:INCLUDEPATH += compat
 }