If you've got a simple class like class MyController attr_writer :log def draggingEntered(sender) end end Then log will show up as an outlet in IB, and draggingEntered will be an action. I installed the iPhone SDK after MacRuby, and all of a sudden those stopped automatically showing up. ib_outlet and ib_action continued to show up fine. Once I installed MacRuby again, the attr_writer outlets and plain-method actions automatically appeared in IB again. I didn't see a wiki for MacRuby...might be useful to put this note somewhere in the docs in case anyone else runs into this. btw, I am instantly addicted to MacRuby. Thanks for such an awesome project. Pat