So in theory, you can install a borrowed working drive, run a firmware password retrieval from the OS, unlock the firmware, then re-mount your original drive, and re-install the OS. Another assumption is that the firmware will allow you to boot from any primary drive. If so, then there would be no easy way to retrieve the code. What might have happened is that the upgrade corrupted the partition. But to my understanding the PIN code is stored on the Hard Drive, and the firmware gets set into lock mode (independent of the hard drive). I'm open for discussion on the topic, so feel free to make a new thread in the off-topic section and invite us there to discuss the not sure what the Lion upgrade situation is right now. both have valid points, but let's keep this thread on topic. It will also remove the firmware password.Īnd please let us know if this method worked for you. Once you enter the right PIN, the Mac will instantly reboot proceeding to where you were at when the lockout occurred. Just restart the machine and continue entering the combinations from where you left off. If you typed in more than 10 combinations, then it says that you are locked out for a minute. In my case the PIN was the second to last 4 digits: 1515 Step 8: Boot up the locked Mac and referencing the number you recorded, you can start trying 4 numbers at a time for the PIN. *It is important that you put it back in the machine where it was originally locked* so that the motherboard firmware will be unlocked in the next step. Step 7: Install the locked drive back into the original locked Mac.įollow your iFixit guide from Step 1 in reverse to put the drive back. Step 6: Once you got the number, power down the machine and remove the locked drive. Step 5: I'd suggest that you take a picture of this file name for accurate reference. Now browse to \Users\username\Library\Application Support\iCloud Step 3: Once booted into the alternate system, locate your locked drive. If you do not have an alternate machine, feel free to ask a tech buddy of yours to lend you their machine. Step 2: Install the drive into your alternate machine. You can find detailed guides for your specific machine at Step 1: Remove the locked hard drive from your Mac. You might need a SATA to USB adapter if you have a laptop without room for an additional drive. *If you're using a PC, you'll need to download and install Mac Drive to be able to read the contents from a Windows environment.Ģ. Alternate machine with space to mount an additional drive. *I'm going to post the steps I did in my case and suggest steps you might take if your case varies.ġ. Solution: Mount the locked drive on another machine, find the PIN, re-install the locked drive into the original Mac, enter the PIN, resume your business.
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