To jchuzi and artie505. The machine is a 20in. iMac, runs 10.6.1, 2 gb memory . It has the normal hard drive, 320 gb, I think, and I do not have any elaborate games or graphics, so I assume there is plenty of space on the hard drive. The situation this morning was that I hit the power button, took care of some paperwork, and then realized that I had a gray screen, with the Apple logo, but no spinning gear( it may have been spinning when I was not looking at it and the quit, but I doubt it). This machine has been VERY reliable, that is one of the reasons I have been using them (Macs) for 19 years. I have never had much trouble, hence the lack of troubleshooting expertise.On occasion it has refused to wake up from sleep mode, but avoiding sleep seems to cure that rare quirk. I tried 2 or 3 times during the day to replicate the morning problem but could not. Maybe it was a one time fluke, but I suspect it will happen again. Any additional advice accepted, Thanks Dave
