How to install Ruby 2.0 on Mac using RVM

Step 1: Installing RVM

Installing the stable release version:

\curl -L https://get.rvm.io | bash -s stable

For more options follow rvm guide

Step 2: Restart Terminal

To use the "rvm" command, let's restart the Terminal (cmd + q)
ensure the "rvm" command work, type that code on your Terminal

rvm

Step 3: Download Ruby 2.0

rvm list known

Step 4: Installing Ruby 2.0

rvm install 2.0.0

Step 5: Make default Ruby 2.0

rvm use 2.0.0 --default