I opened my iMac today and was brought to a screen with a blinking file with a question mark. I followed the instructions and rebooted but now I have a blank grey screen. What do I do next? It seems to have lost the boot up drive.
iMac 27″, macOS 10.12
Please follow the steps Apple describes in If your Mac starts up to a question mark. If you get through all the steps and it still will not startup your next step is to take it into an Apple Authorized Service Provider in your area. If you do know of any, please click Apple Authorized Service Provider Locator (AASP) & Genius Appointment
The blinking question mark is a sign that your machine cannot access the boot/startup drive. Not sure what to make of the blank grey screen.
What instructions are you referring too?
How old is your machine? What type of drive do you have?
Give it a virtual kick.
Resetting your Mac's PRAM and NVRAM
http://docs.info.apple.com/article.html?artnum=2238
http://discussions.apple.com/thread.jspa?messageID=3497603�
power down machine.
hold down the option/alt key
continue holding
you should get a list if startup drives. less ten 10 seconds
You should boot up in recovery mode. command + r
see if you can run disk repair
Report back.
R
Failure of IMac to boot up
