How to reset Firmware Password? iMac, Lion, 10.7.3

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I forgot the Firmware Password, and want to reset it.


How can I do it?



No DVD included when I bought it.

All the startup keys, like C, N, T, D, CMD+s, CMD+Option+p+r, CMD +v, Option, and Shift, does NOT work.

To add or remove DIMMs does NOT work.


Please, give me some helpful answer.

iMac, Mac OS X (10.7.3)

Posted on Apr 4, 2012 9:34 PM

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33 replies

Dec 4, 2014 6:27 PM in response to ledstixx

Basically, with out going to an Apple Store you're out of luck. As this Cnet article explains, the password is stored on a separate flash chip that requires very specialized knowledge to program. Here's the link:


http://www.cnet.com/news/efi-firmware-protection-locks-down-newer-macs/


So without breaking into Cupertino and stealing the Apple app that generates the unlock file or doing some very difficult soldering work, an Apple Store is your only recourse.

Nov 11, 2016 1:12 AM in response to ResetFirmwarePassword

Simply shut down your apple, take out ram if using laptop take out battery as well turn on apple without ram, hold down command ,option,p, and r until apple beeps 3 times after shut down this will bypass the firmware password and allow you to boot from hard drive, CD, DVD, or flash drive check and make sure you reset password sometimes thing resets without needing to do again good luck

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How to reset Firmware Password? iMac, Lion, 10.7.3

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