If you know the current password and simply want to disable it:
xxd -c 16 original_bios.bin | grep -i "pass" # Then manually zero the bytes: printf '\xff' | dd of=original_bios.bin bs=1 seek=0x1234 count=1 conv=notrunc
You cannot boot from a USB installer. Persistent: It remains even if you wipe the hard drive. Method 1: The Official Apple Solution (Recommended) remove efi passcode lock
: Write the edited file back to the chip and solder it back onto the board. How we remove EFI Lock Password on a Macbook Pro laptop
: Use a hardware programmer to read the chip's binary data. If you know the current password and simply
Are you comfortable , or do you prefer a software-only approach?
: If you can provide valid proof of purchase (like an original receipt), Apple technicians can unlock the machine for you. This is the safest method to ensure no hardware damage occurs. Software Removal (If you know the password) How we remove EFI Lock Password on a
: Open the file in a hex editor, search for the $SVS string, and fill that section with FF to clear the password data.
Open the chassis and remove one of the RAM modules.