Quick update to this ongoing problem. It’s looking like the NVIDIA GeForce 9400 and the NVIDIA GeForce 320M are the problem.
SimGuruHydra has commented on the thread over at TS3 letting us know they are aware of the problem (no comment…….).
In the meantime, if your Mac has one of these cards as the integrated card, and you have two graphics cards in the machine, try switching over to the dedicated card:
System Preferences > Energy Saver
Sorry to keep going on about this but I’m getting a lot of hits about it so hopefully people are aware of the specific problem and it will be resolved shortly.