Clearing the CMOS can reset the EFI password to its default setting. To do this:
Unlocking an EFI (firmware) password on a Mac varies significantly depending on the device's age and security chip. Official Apple support is the only guaranteed safe method, while alternative technical methods exist for older or specialized hardware. Official Unlock (Recommended) If you can provide proof of purchase (original receipt or invoice), Apple Support Apple Authorized Service Provider can unlock the firmware password using proprietary tools. Apple Support : Free or a service fee depending on your warranty status. Requirements : The device, your ID, and the original purchase receipt. Apple Support Community Intel Macs with T2 Chips (2018–2020) unlock efi password top