Added a note that you have to add Mac/Lib to sys.path after doing
a "make installmacsubtree".
diff --git a/Mac/OSX/sample_sitecustomize.py b/Mac/OSX/sample_sitecustomize.py
new file mode 100644
index 0000000..09ab44f
--- /dev/null
+++ b/Mac/OSX/sample_sitecustomize.py
@@ -0,0 +1,4 @@
+import sys
+import os
+_maclib = os.path.join(sys.prefix, 'Mac/Lib')
+sys.path.append(_maclib)
\ No newline at end of file