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Question: What is flashing question mark on screen mean?

Error code4H00/11/40000000:SATA(0.0) then a flashing question mark what might have happened can’t reboot . MacBook Air 2012

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Dec 11, 2017 12:02 PM in response to Lindaben8 In response to Lindaben8

A flashing question mark or globe appears when you start your Mac.


The error code suggests the HDD may be failing. Since this appears to be a hardware problem: Make an appointment at the Apple Genius Bar for service. If you need to find an Apple Store - Find a Store - Apple.

Dec 11, 2017 12:02 PM

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Question: What is flashing question mark on screen mean?