I have a 13" 2011 MacBook Air A1369 stuck on a grey screen. When I startup I can hear the chime and the computer proceed to go to a blank gray screen immediately. The screen has no Apple logo or loading bar.
What I have tried till now:
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Booting in recovery by holding Command + R — no effect, blank screen.
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Booting in single-user mode by holding Command + S — no effect, blank screen.
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Booting in verbose mode by holding Command + V — no effect, blank screen.
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Booting in Safe mode by holding Shift — no effect, blank screen.
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Booting in hardware diagnosis mode by holding D — no effect, blank screen.
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Resetting PRAM by holding Command + Alt + P + R — no effect, blank screen.
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Resetting SMC by holding Shift + Alt + Control while pressing the power button, then pressing the power button alone — no effect, blank screen.
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Choosing another booting drive or recovery partition by holding Alt — no effect, blank screen.
Is there something else I could try to get past this gray screen?
Best Answer
I have found the problem, the BIOS firmware was badly corrupt from a failed macOS update, i had to fix it hardware removing the BIOS chip and flashing it again, now it's working perfectly!