Restoring a MacBook Pro with an encrypted hard drive

Hard drive encrypted using FileVault? Lost your password? 

You can’t get your data back, but you can make the MacBook usable again:

  • Start the MacBook in Target Disk Mode by holding down ‘t’
  • Connect the MacBook to another computer using a Thunderbolt Cable.
  • You will be prompted for the drive’s password. Click Cancel.
  • Wipe the partition table of the drive using sudo dd if=/dev/zero of=/dev/diskN bs=1024k count=1 (where N is the drive number)
  • Eject the drive.
  • Reboot the MacBook while holding down Cmd-R to enter recovery mode. It will switch to “Internet Recovery Mode” and begin the restore process.
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