I feel the same. I fondly remember doing hour-long raytracing on the Amiga and having set the priority to something low I never noticed the rendering going on.

I feel the same. I fondly remember doing hour-long raytracing on the Amiga and having set the priority to something low I never noticed the rendering going on. On the Mac, it seems no matter what I set the priorities of the involved processes, long compiles makes it impossible to game at the same time.