3 ms·

Combined with a firmware password, it makes a MacBook impenentrable.

• st3fan 15y ago
  Got a good pointer to setting a firmware password?
  • mahyarm 15y ago
    http://support.apple.com/kb/HT1352 http://support.apple.com/kb/HT1352
  • AdamGibbins 15y ago
    Reboot your Mac into recovery mode (hold Cmd+R on bootup), its in one of the menus there.