HID Device Framework
I don't know if anyone else has found this, but Dave Dribin released a Cocoa front end for the IOHIDLib. It's called DDHIDLib. You can download the source and build it as a framework, then include it in a Cocoa game since he released the source under the MIT license. The source code includes a couple of sample projects demonstrating how to use the library.
Thanks, nice find BlackTiger! I'll be checking that out for sure!
Thanks for the tip, but as i am not so experienced in "back-engineering" that code, could you please link, if there are any, kind of tutorial about that?