How do Apple engineers reset EFI password on new MacBooks
https://apple.stackexchange.com/questions/32900/how-do-apple-engineers-reset-efi-password-on-new-macbooks
If you have admin access, and a 10.6.x install DVD or USB key for your Mac, this MacEnterprise posting has instructions to use setregproptool to enable/disable the firmware password. If you have Lion, it's probably on the recovery partition somewhere, but I haven't investigated. Share Improve this answer answered Dec 4, 2011 at 8:41 Gordon Davisson
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