[Tutor] Python Error Message

[hs ghs]

Hi, I've just upgraded to Python 3 and now when I try to run scripts that
use tkinter I get the following error message:-

_tkinter.TclError: error getting working directory name: not owner

The error is when I run the scripts using IDLE. When I run from the.
terminal they are fine.

All this is being done on a Mac.

Any help gratefully received. Oh, and I am very much a computer novice so
please keep it very simple.

Thanks.