CocoaPods/Specs — pull request #5083 by pyro2927 (2013-10-31 01:24:29+00:00)
Title: Allowing Airbrake-iOS to be used with OS X

Even thought it's named Airbrake-iOS, it works with OS X too. They have an OS X sample project in their repo:
https://github.com/airbrake/airbrake-ios/tree/master/Xcode/Hoptoad%20Mac