HT204156: About the screens you see when your Mac starts up
Learn about About the screens you see when your Mac starts up
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Helpful answers
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Jul 31, 2016 2:58 AM in response to koorosh05by Esquared,Startup in Recovery Mode, and check if Disk Utility can find (and repair) any errors on your Disk. Hopefully you have a backup, just in case.
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