Issue #24225: Fix additional renamed module references.
diff --git a/Lib/idlelib/macosx.py b/Lib/idlelib/macosx.py
index 1e16f2c..618cc26 100644
--- a/Lib/idlelib/macosx.py
+++ b/Lib/idlelib/macosx.py
@@ -155,7 +155,7 @@
         if end > 0:
             menu.delete(0, end)
         windows.add_windows_to_menu(menu)
-    Windows.register_callback(postwindowsmenu)
+    windows.register_callback(postwindowsmenu)
 
     def about_dialog(event=None):
         "Handle Help 'About IDLE' event."