Today I switched from RVM to rbenv. This ThoughtBot post was a great starting point.
I ran into a couple hitches. Here’s how I got through it. Do this stuff before you start the ThoughtBot stuff.
First, brew doctor. I ran it a bunch of times and followed the steps until it was clean.
The hardest step was XCode. I was running 4.2.1 and brew wanted 4.6.3. I downloaded the new 4.6 version through the app store, but brew was still using my old standalone 4.