Install Ruby on Mac

instructions.md

Ensure xcode and dependencies are installed

xcode-select --install

Install and set up Ruby

brew install chruby ruby-install;

ruby-install ruby

chruby ruby-1.9

For auto-switch

source /usr/local/share/chruby/chruby.sh
source /usr/local/share/chruby/auto.sh

Resources https://github.com/postmodern/chruby https://formulae.brew.sh/formula/ruby-install