Although I’m not a Ruby developer, I encounter Ruby in many places as a user.
This page collects some notes on using Ruby on Mac OS X.
Mac OS X comes with Ruby installed. At a certain point, you run in to version
problems and need to upgrade it. Googling for upgrading Ruby is a pain. These
Install RVM - Ruby Version Manager
Don’t forget to …
Install a new version
Next, list the known versions that can be installed and pick the one you need.
Start using the new version