A kernel panic is caused by a driver bug, an OS bug, or a hardware fault. Apple's done pretty good keeping driver and OS bugs down and we run into those pretty rarely.
Please set your limited fps to the very low end to determine if it is a heat induced fault. I seriusly doubt that any of your other screens savers are as resource intensive as MA. New versions will all default to frame limit at 60 fps (which you'll be able to turn off or adjust).
|