On my 27" corei7 mid2010 iMac, i get every now and then a white screen, that seems to cover up the users login page. This occurs just before the Apple logo and the Chime sound. Normally when this occurs, thinking that its a freeze, i do a restart by using the power button. But today i acted as if there was no white screen and i pressed the buttons as if i was logging in to my user and it worked. This white screen seemed as if it was a cover up.
What could be wrong? Is there anything i can do about it? Any suggestions?
What could be wrong? Is there anything i can do about it? Any suggestions?