@Edent Neat article, definitely bookmarking this because I know it'll come in handy having worked with TOTP stuff before, so thanks for sharing! One question:

Just whatever software is native to MacOS.

What version of macOS? Python 3 has been bundled with macOS by default for some time now - unless you mean that it's been removed/disabled by some policy on your machine, in which case, fair enough, forgive me!