Rip out all the u"..." literals and calls to unicode().
diff --git a/Lib/plat-mac/FrameWork.py b/Lib/plat-mac/FrameWork.py
index 2a07c99..8a9b3a5 100644
--- a/Lib/plat-mac/FrameWork.py
+++ b/Lib/plat-mac/FrameWork.py
@@ -561,7 +561,7 @@
         self.menu.AppendMenu('x')           # add a dummy string
         self.items.append((label, shortcut, callback, kind))
         item = len(self.items)
-        if isinstance(label, unicode):
+        if isinstance(label, str):
             self.menu.SetMenuItemTextWithCFString(item, label)
         else:
             self.menu.SetMenuItemText(item, label)