CoreGraphics only supports the wx.COPY logical function.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43604 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/demo/Mask.py

@@ -26,6 +26,12 @@ logicList = [
     ('wx.XOR', wx.XOR),
 ]
 
+if 'mac-cg' in wx.PlatformInfo:
+    # that's all, folks!
+    logicList = [
+        ('wx.COPY', wx.COPY),
+    ]    
+
 import images
 
 class TestMaskWindow(wx.ScrolledWindow):