Howdy I have a black MacBook C2D 2.0GHz. When I got it I'm pretty sure the CPU was usually around 48-52°C (118-123°F). Nowadays though, it's mostly idling at 60°C (140°F). How hot are your MBs running when idle? I opened it up a while ago to see if there was any dust in there. Not much though, and I cleaned everything out. Maybe it's just old age, but I'm still wondering if this could hurt the CPU in any way, and if there's something to do about it.