Okay, this looks like a silly question. I guess I'm hearing a fan or could it be the hard drive. The unit is getting hot. The fan or whatever never came on before. I have the unit raised a little to let air pass beneath. Should I worry? I'm in the middle of a huge project and if I lose my computer function . . .
iBook G4, Mac OS X (10.4.4), 30yrs on Windows: New to Apple--Happy, but CLUELESS.