- Sep 18, 2012
- Reaction score
Hi, I need some help. When I switch on my 27" iMac all that happens is it goes into the powering up screen, white screen with the apple symbol and a progress bar running underneath it and the grey spinning wheel spinning. Once it gets all the way through the progress bar (takes about 10 mins) the computer shuts down. I can't get past that screen. I have unplugged everything, rebooted the wireless connection etc. Not sure what else to do? We did have a brown out with our power on Monday night and we were off for 6 hours but I used the iMac on Tuesday night with no issues. (Brown out is limited power supply). Help???