Selecting the macfsn option didn't work, fixed.
Fixed the help strings.
Swapped the macfsn and help button numbers.
diff --git a/Mac/scripts/EditPythonPrefs.py b/Mac/scripts/EditPythonPrefs.py
index 618d33e..44d89a6 100644
--- a/Mac/scripts/EditPythonPrefs.py
+++ b/Mac/scripts/EditPythonPrefs.py
@@ -50,8 +50,7 @@
 	None, None, None, None, None, None, None, None, # 11-18 are different
 	"tabwarn",
 	"nosite",
-	None,
-	"nonavservices"]
+	"nonavservice"]
 opt_dialog_dict = {}
 for i in range(len(opt_dialog_map)):
 	if opt_dialog_map[i]: