Comment by mattetti

And here is how MacRuby developers were lied to and the RubyMotion project made the choice to not contribute back but instead to focus on keeping innovation proprietary.

https://lists.macosforge.org/pipermail/macruby-devel/2012-Ap...

It's quite a sad day to think that Apple invested on MacRuby and kept it open source... and RubyMotion chose another route even for OS X dev.