Can I get a clarification on what the Compilation build step does? GOAL: Compile a MacRuby app and remove unnecessary Ruby files in order to achieve the smallest app size possible. I have a MacRuby 0.6 application built with Xcode. I'm building it with the Compile option so I get .rbo files in my app bundle. I also deleted all the /usr/lib/ruby Ruby files in the built app in order to reduce the final size of the app (25 MB saved): https://gist.github.com/6af67e1927969b9a47c1 My app uses Ruby's File and Dir classes, but everything else is Cocoa. Surprisingly, it works on several different machines, even without MacRuby 0.6 installed. Do I understand correctly that the code of those files is compiled into the .rbo files in my app? Or is it getting File and Dir from my MRI Ruby installation? -- Geoffrey Grosenbach boss@topfunky.com ........................ PeepCode Screencasts http://peepcode.com