macOS 11 (1107) or later required, have instead 11 (1106) !
nocontent06 opened this issue · comments
That's not an issue with ProperTree - that's an issue with python/tk itself. Try installing the latest python and see if that resolves it. You're currently running python 3.8, which is fairly old and uses tk 8.5 IIRC (see documentation here) which is rather buggy in macOS.
-CorpNewt