From: Steve Klabnik <steve@...>
Date: 2012-02-15T00:31:46+09:00
Subject: Re: How to install 1.9.3 via rvm in OS X Lion?

"rvm requirements" explains all. Or, if you google:
http://pivotallabs.com/users/aberlin/blog/articles/1984-installing-ruby-1-9-3-w-rvm-on-mac-osx-lion