Python+MacOS Versions

[Jeremy Lavergne]

Does anyone happen to know what versions of Python each MacOS shipped with?

  * I'm specifically hoping to find when python3.8 began being 
pre-installed on MacOS to update a PSPP build-dep that's only required 
on systems without python3.8.

https://github.com/macports/macports-ports/blob/master/math/pspp/Portfile#L48

  * Also hoping to make a wiki table with known versions for future 
reference.