I encrypted my computer with FileVault full disk encryption on Yosemite. FileVault gave me an emergency decryption code to use when I forgot my password.

For some reason, when I changed my account password while the drive was being encrypted it gave me another emergency code. How can I verify which one works?


Can restart the computer in recovery mode (Cmd-R, while starting up). Go to Disk utility. Encrypted disk will be greyed out. Right click (option- click) to unlock it. See which of your codes work.

  • Neither code worked, however my account password was able to decrypt the disk. However there is a possibility that I mistook a letter for a number; I'll try it again today – alexyorke Nov 10 '14 at 12:13
  • if neither works probably safer to turn file vault of and on again to get new code. I always copy and past these codes. It is the code in the XXXX-XXXX-XXXX-XXXX-XXXX-XXXX format? – Joop Nov 10 '14 at 12:16
  • Yeah, my code is in that XXXX-* format. I also entered in the dashes into Disk Utility; not sure if I was supposed to or not. – alexyorke Nov 10 '14 at 12:17

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