Open the physical chassis and remove one of the RAM modules.
4. Third-Party Hardware Programmers (Modern Intel Macs 2015–2020)
Apple uses its master private key to generate a small binary file named SCBO (Secure Config Base Object) tailored specifically to that Mac's serial number. unlock efi password top
This is the most complex, risky, and least recommended method for beginners. It requires a deep understanding of electronics, soldering skills, and the correct software tools. The slightest mistake can "brick" your motherboard, rendering the computer completely unusable. It should only be attempted by experienced hardware technicians who have the necessary tools and expertise.
Connect the locked Mac to the host Mac via the specific USB-C ports (usually the one closest to the trackpad on the host). Open the physical chassis and remove one of the RAM modules
The most common hardware trick involves removing the small, coin-cell battery (typically a CR2032) from the motherboard for a period of time. This starves the CMOS memory of power, causing it to lose its stored configuration, including the password. The standard procedure is: turn off the PC, unplug all power cables, and discharge residual power by holding the power button for 15 seconds. Open the case, locate and remove the battery, and leave it out for 5 to 10 minutes before reinstalling it. Upon reboot, the password should be cleared, and the BIOS will have reverted to its factory defaults. Crucial Note: This method is becoming obsolete on many modern laptops and business-grade devices. Many new computers store passwords in non-volatile memory that is not cleared by power loss. Additionally, on many laptops, the CMOS battery is not removable or is soldered to the board.
Flash the newly cleaned .bin file back onto the physical chip via the programmer, reassemble the Mac, and boot up. Summary: Apple Silicon vs. Intel This is the most complex, risky, and least
Click or enter your Apple ID credentials to reset the lock. Intel Macs with T2 Security Chips (2018–2020)
It works on 100% of laptops, including Apple MacBooks (T2 chip excluded) and Lenovo ThinkPads with Supervisor passwords.
Before attempting any unlock, search your exact model number + "BIOS password unlock service" on eBay. For $15-$25, many sellers will remote-desktop or mail you a custom USB stick that unlocks your specific motherboard in 2 seconds. That might be the true "top unlock EFI password" secret in 2025.