Last I checked, macOS doesn't include python3, just python2. I wrote a handy tool for our team, but nobody uses it because they don't have python3. Now I have to play sysadmin on dozens of machines.
A few had 3.5, but I used 3.6.
What can be done to make this easier? I.e. why isn't python3 pre-installed by now? esp 3.6 or 3.7?
Because Apple is notorious for using outdated libraries in macOS, like OpenGL. They included Python, but it was never a real focus to stay up to date since it was primarily to support legacy software.
With that said, Apple will not be including Python (or the other scripting languages like Ruby or Perl) at all starting with Catalina.
A few had 3.5, but I used 3.6.
What can be done to make this easier? I.e. why isn't python3 pre-installed by now? esp 3.6 or 3.7?