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I'm helping someone that changed their password (Thanks to corporate policy) and then forgot what they set it to. They remember the first part so I would not need to completely brute force it. I was thinking about booting into recovery mode and trying to run some kind of script from bash to try to unlock the partition (diskutil corestorage unlockvolume UUID -passphrase PASSWORD) using different passwords until successful.

  1. Is there a better approach?
  2. If this is an okay approach... Does anyone know of any scripts that would do this kin of thing?
  • Is the password going to be english words only? You can try your luck with a dictionary attack, as it's a lot easier than brute force. Just 5 random letters (only lower case) have a keyspace of ~1.2m possibilities. – Alexander Mar 31 '14 at 4:09
  • Are you using Filevault 2? – PoisonNinja Mar 31 '14 at 12:46
  • The person I'm helping remembered their password after many attempts. I will just leave this question up for others that might be in this situation. Maybe someone out there has a good answer. – Kevin Kaske Apr 1 '14 at 3:25

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