Read More: Repair your macOS startup drive A faulty startup drive might cause the Mac gray screen with no logo.Peripheral devices that don’t have an updated firmware can lead to Mac gray screen with circle slash.A defective or unauthorized peripheral device causes your Mac to stall at the gray screen while waiting for the device to respond to the command.Reasons behind the Mac Gray Screen of Death Error So, what do you do? First off, you should try to find out all the possible causes behind a gray screen on Mac. In any case, your Mac gets stuck, and you can’t skip the screen to move forward to the login screen. But you may find the Apple logo, a spinning globe, a folder with a question mark, or a prohibitory sign along with the gray screen. Sometimes, your Mac doesn’t even show an error message stating the real cause behind the gray screen. It can be quite frustrating when your iMac, Mac mini, MacBook Air, or their Pro model stalls on a plain gray screen. Use Disk Utility to Repair the Storage Driveĥ. Disconnect All External Peripheral DevicesĢ. Reasons behind the Mac Gray Screen of Death Errorġ.

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