Force Removal of Password Protection
If you forget your password, or if a user has enabled it on a lab Mac and you need to remove it, follow these steps. First, add or remove DIMMs to change the total amount of RAM in the Macintosh. This modification will remove the block on the keyboard combination for resetting the PRAM and NVRAM.
Note, merely moving RAM to another slot will NOT work. Other documentation incorrectly states that modifying RAM removes password protection, but it actually only enables the keyboard combination for resetting PRAM, which is normally blocked with the command security mode. Resetting the PRAM actually removes the password protection.
Follow the steps below to reset the PRAM and NVRAM:
(1) Shut down the Macintosh.
(2) Press the power button to turn the computer on. You will hear the Macintosh's startup sound.
(3) Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
(4) Hold the keys down until the Macintosh restarts and you hear the startup sound for the second time.
(5) Release the keys and let the Macintosh startup normally.
Now, the password protection should be removed from the Mac.
Please let us know if this works!
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