There is a ruby 2.6 installed in /usr/bin/ on my Mac and I have NO fucking idea where it came from and I am not allowed to get rid of it.
What in the fucking world??
Turns out it comes with MacOS and it's built-in and I can't remove it and its also at the top of everything so it's time to hack my .zshrc and my paths to make sure it NEVER finds this old crap garbage ever again.
This also reminds me I need to change my blog tech already and stop using goddamn Jekyll.
Lady, EVOLVED 
@thephd in my experience the simplest solution on macos is just to use rbenv always
but yes, macos installs a number of programming languages that they really shouldn't for legacy reasons to keep people's old workflows from unexpectedly breaking on a new OS upgrade
used to also ship with python 2.7, but they finally managed to drop that one after many years of deprecation notices
