Removal: Efi Firmware Password

On older MacBooks, MacBook Pros, and iMacs (manufactured before late 2010), the EFI password was stored in non-volatile RAM (NVRAM). Because this memory required power to retain data, removing the power source would wipe the password.

I carefully clamped the clip onto the chip's pins without powering the laptop. The programmer connected to my desktop via USB. Using software called flashrom , I dumped the entire 32MB firmware image to a file. efi firmware password removal

But what happens when the authorized user forgets the password? Or when you buy a second-hand Mac that wasn’t properly wiped? On older MacBooks, MacBook Pros, and iMacs (manufactured

she asked.