'com.apple.cocoa.foundation' finding the library?

When I am trying to run the code, it asks for 'com.apple.cocoa.foundation', It's wanting the library, where would I find this? I have searched, but no success.

Thanks

I think it may be something to do with your OS rather than an arduino library that you can install? Some links below might help but i'm not 100% sure.

https://developer.apple.com/technologies/mac/cocoa.html
http://playground.arduino.cc/Interfacing/Cocoa