macos – Upgrade of Python 3.9 with homebrew fails on High Sierra 10.13.6

I’m obligated to upgrade my python on my brew installation so that I can upgrade many other software packages. Every time brew tries to make python (does from source), it gets stuck on make for days, really days. I have to quit, and I have resorted to having my current python pinned to get by with updating my casks. I don’t know where to look to even begin to troubleshoot this issue.