From: Chris Hulan Date: 2011-03-26T00:10:24+09:00 Subject: Re: Do I need to upgrade to the latest version of Ruby > 6- Why is that I cannot see the Ruby installation anywhere in my Mac, > where is Ruby installed? open a terminal (found in utilities), type 'which ruby' at the command prompt and it should say where ruby is 'ruby -v' will display the version If you've been using it, I assume via some editor/IDE, the properties/ settings may have an entry displaying which ruby it is using cheers