When the Mac login screen opens, reconnect a peripheral, then restart the Mac.Press the power button to switch on the Mac.Remove audio cables, headphones, Ethernet cables, and other peripherals from Mac.Shut down the Mac by pressing the Power button for 3 to 5 seconds. ![]() You need to remove all the peripherals one by one by using the method mentioned next. This signaling issue freezes your Mac during the boot process. ![]() Disconnect All External Peripheral DevicesĪ defective peripheral or cable causes the signaling pins on Mac’s ports to get stuck in a single condition (low, high, or neutral). Take a look at some in the next sections. If you’re facing the Mac gray screen after login or at startup, there are multiple ways to try and fix the issue.
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