Mac/Ruby
From charlesreid1
Installing Ruby on Mac Sierra:
Do it by installing RVM (Ruby version manager):
$ curl -L https://get.rvm.io | bash -s stable --ruby
This line should already be added to bash_profile:
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*