Add warnings to and deprecated all those Mac modules
diff --git a/Lib/plat-mac/bgenlocations.py b/Lib/plat-mac/bgenlocations.py
index 271eb3e..7643e4b 100644
--- a/Lib/plat-mac/bgenlocations.py
+++ b/Lib/plat-mac/bgenlocations.py
@@ -7,6 +7,9 @@
 
 import os
 
+from warnings import warnpy3k
+warnpy3k("In 3.x, the bgenlocations module is removed.")
+
 Error = "bgenlocations.Error"
 #
 # Where bgen is. For unix-Python bgen isn't installed, so you have to refer to