Since the machine with the fastest graphics card I currently have access to is a Mac, I'm kinda interested in this, too. I recently tried to build cgminer 1.2.6-1 on it and there was a compiler error and configure couldn't find the Mac OpenCL implementation.
So if there's any testing you need done, I'll be happy to do it as I have time, since I would like to use something other than DiabloMiner there (which keeps segfaulting as of recently).

Edit: And yes, I've seen the entry in the news file about fixing the OpenCL tests, I'm just waiting for the next release to try this.