OS X Lion Firmware (EFI) Password Problem
This MacBook (black 2 GHZ Intel Core Duo) would not accept the firmware password I just set via the Firmware Password Utility from the Recovery Partition in OS X Lion 10.7.2.
The following steps let me turn off the firmware password protection. It only works if you haven't forgotten the password you had set. I my case this means I had used the correct password but it wasn't accepted. Seems like a bug, maybe specific to my particular (and rather old) hardware.
1. Open Terminal and type diskutil list
2. Mount the Apple_Boot Recovery HD partition with diskutil mount disk0s3 (use the identifier you see listed)
3. In Terminal type: open /Volumes/Recovery\ HD/com.apple.recovery.boot/BaseSystem.dmg
4. In Terminal type: open /Volumes/Mac\ OS\ X\ Base\ System/Applications/Utilities/Firmware\ Password\ Utility.app
5. Now you can turn off firmware password - again, provided you know the password you had set
I had the same problem. Thanks for the solution, it worked like a charm! PS: Might it have anything to do with keyboard layout? I have Belgian Azerty
Thanks so much man, had the same problem on my MBP 17" late 2011.... Layout is german qwertz...
Super! It works!
Thank you so much.
I have a MBP 15" early 2010.
My layout is german qwertz.
Another thank you, perfect!
Macbook pro 17" 2.53 Ghz Intel Core i5
Had the same issue on my Macbook Pro 15inch Retina 2,3 GHz Intel Core i7.
Thanks a lot for sharing this, fixed my problem !
very strange. I still have the issue !
I cannot modify it neither using GUI or using command line utility from basesystem.dmg
I tried the procedure above making step by step but I still cannot turn off the protection. I didn't forgot my current firmware password
MBP 15" Core i7 Late 2011 (Lion)