This section is cleared (overwritten with FF ) and the modified firmware is flashed back onto the chip. B. The SCBO Unlock Method
For T2-equipped or Apple Silicon Macs, traditional chip-flashing is ineffective because the keys are handled by the Secure Enclave. efi firmware passcode unlock
For newer Intel-based Macs with the T2 chip, security is much tighter. Set a firmware password on your Mac - Apple Support This section is cleared (overwritten with FF )
Its primary function is to prevent unauthorized users from booting the device from external media or modifying low-level system settings. Because this lock resides at the firmware level, standard password recovery tools or operating system reinstalls cannot bypass it. efi firmware passcode unlock