Summary

This was something discussed in #23009.

There is most definitely a better thing than 3.6 to use because we don't support 3.6 anymore 😄 We should probably change all of the python3.x to python3 everywhere... Unfortunately, mac is still only shipping with python2 by default (on my recently upgraded system at least), so python is not good enough here.

Originally posted by @greglucas in #23009 (comment)

Proposed fix

At minimum, fix this in the installation guide, where it was mentioned in #23009. I think this should be changed everywhere in the docs. There is no reason to specifically suggest the use of python3.x, rather than python3.