diff --git a/wxPython/distrib/mac/_buildPython b/wxPython/distrib/mac/_buildPython
index 16bc2c6641..7dd63cb521 100755
--- a/wxPython/distrib/mac/_buildPython
+++ b/wxPython/distrib/mac/_buildPython
@@ -126,6 +126,15 @@ for f in Numeric numarray; do
 done
 cd $curDir
 
+#-----------------------------------
+msg Adjusting ownership and permission
+
+for d in Applications Library; do
+    msgdo chown -R root:admin "$dstPath/$temp/$pkgRoot/$d"
+    msgdo chmod -R g+w "$dstPath/$temp/$pkgRoot/$d"
+done
+msgdo chown -R root:wheel "$dstPath/$temp/$pkgRoot/usr"
+
 #-----------------------------------
 msg making installer package
 msgdo cp -pR "$progDir/resourcesPython" "$dstPath/$temp/"