A quick and easy step-by-step guide to get your Ruby environment up and running again after a fresh install of Mountain Lion. I messed up my installations a few times and figured I'd just put out a Gist once and for all to get this sucker working in one go.
First go ahead and install either XCode to get ahold of the Command Line Tools. Or, if you prefer not to install XCode, simply download the latest version directly. This only requires you to provide your Apple ID and password to sign in. You do not need a developers license.
- Or install them through XCode via the preference panel