I run the OS X Diablo Minor on my new Macbook. It seems to work well enough and it earns me a few bit-cents each day.
The only problem is that I have to cut it off whenever I'm working on the Mac, because it hogs the GPU. Is there a parameter or some config file within the .app bundle that I can modify that will reduce the aggression level so I can use my Mac and mine with unused GPU cycles?