Suggestion: advice to install python 3.8 for macOS

Other versions of python doesn't seem to work (at least for me), I would get an error like this:

<img width="723" height="149" alt="Image" src="https://github.com/user-attachments/assets/42bf05e5-0aca-4c43-8a7b-c556eaba916e" />

after doing "python3.8 Propertree.py" I could finally use the program