Import the MacOS toolbox modules from the Carbon package.
diff --git a/Mac/Tools/IDE/BuildIDE.py b/Mac/Tools/IDE/BuildIDE.py
index 942670a..7e65869 100644
--- a/Mac/Tools/IDE/BuildIDE.py
+++ b/Mac/Tools/IDE/BuildIDE.py
@@ -5,7 +5,7 @@
 import sys
 import os
 import buildtools
-import Res
+from Carbon import Res
 import py_resource
 
 buildtools.DEBUG=1