Here is everything you need to know about removing it, ranging from the "Apple Approved" method to the technical hardware hacks. Difficulty: Easy | Success Rate: High (If you have proof)
The following post is for informational and educational purposes only. Removing a firmware password from a Mac you do not own is illegal (theft) and a violation of privacy laws. This guide is intended solely for individuals who have forgotten their own password on a machine they legally own, or for authorized repair technicians. How to Remove a Mac Firmware Password (The Official & Unofficial Ways) If you’ve ever bought a used Mac or simply forgotten an old password, you know the nightmare of turning on your Mac only to be greeted by a locked padlock icon and a password field before the system starts up. That’s the Firmware (EFI) Password . mac firmware password removal tool
Older Intel Macs stored the firmware password in a specific memory location that could be wiped by manipulating the RAM. Here is everything you need to know about