168 Views 5 Replies Latest reply: Aug 8, 2012 4:56 AM by Xelayul
My iMac is 27inch i5 quad core with 8 gb of ram. I upgrade it with mountain lion and it took a long time to complete the process. I power down the mac. I power it back and this time the screen is gray for a long period. It look like it hang up or refuse to boot up. I notice the top of the screen is extremely hot. I am afraid it may do damge if I let it run over night. I manually power down the mac. Any of you iMac user have experience this kind of issue?