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Suddenly my MacBook Air won't accept my password. When I restart, the first screen offers to let me login with my username and symbol, and accepts my password, but then opens a screen giving me the option to logon as Guest or a fill in the blank Name, and if I put on my name and password it doesn't work. I can't get past this except as guest so can't get in the Apple menu. Any idea what is going on and what I can do ? Have tried restarting, turning off, logging in as guest, and still locked out.

  • Is FileVault enabled? It can cause some login issues – Jackson1442 Feb 13 '17 at 6:07
  • Yes. From the beginning 3 years ago. It's required at work – user7554744 Feb 13 '17 at 6:09
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May be the trash became full and not enough memory to bootup. You try boot in target mode , mount the disk in another mac machine and clear the trash. or In Recovery mode open "Disk utility -> repair disk" may help.

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