Add warnings to and deprecated all those Mac modules
diff --git a/Lib/plat-mac/macresource.py b/Lib/plat-mac/macresource.py
index f68ecdc..0a66d76 100644
--- a/Lib/plat-mac/macresource.py
+++ b/Lib/plat-mac/macresource.py
@@ -1,5 +1,8 @@
 """macresource - Locate and open the resources needed for a script."""
 
+from warnings import warnpy3k
+warnpy3k("In 3.x, the macresource module is removed.")
+
 from Carbon import Res
 import os
 import sys