I have been using the answer provided here and that works just fine under Python 3.7 using pyobjc 6.1
Change title of Tkinter application in OS X Menu Bar
However I am starting a new project and am using Python 3.8 and the latest pyobjc 8.1 and even though pyobjc is installed and I can see it in the path I get the error
from Foundation import NSBundle
ModuleNotFoundError: No module named 'Foundation'
I'm at a loss now as to how to get it working again.