I've stopped fighting with gems and just gave into the new --gem option in macruby_deploy today. Alas, I'm fighting with gems again. My app, which I'm adding features to, btw, has been running quite nicely here at UC Berkeley to drive Selenium as a web app probing and monitoring device. I'm getting this error as I try to embed the action_mailer gem in my app: Cannot locate gem `action_mailer' in ["/Users/r/.gem/macruby/1.9.2", "/Library/Frameworks/MacRuby.framework/Versions/0.9/usr/lib/ruby/Gems/1.9.2"] But I've got the action_mailer gem in both locations, along with it's dependencies, so I'm confused. It'd be nice if there was a definitive web page for managing gems in MacRuby (or maybe there is and I'm missing it). Part of the problem is that I'm using RVM which has a distinct file hierarchy.... thanks, russ