The M1 serial number is cryptographically linked to the Apple ID used to enable . If the serial number is changed, the Secure Enclave immediately detects a mismatch between the serial and its internally stored certificates. The result: the Mac refuses to boot past recovery mode, or it becomes bricked.
: If you are unsure if your M1 is new or refurbished, you can verify its status via Apple Support rather than attempting a serial change. macbook m1 change serial number
If you need to "change" the serial number for a legitimate repair or ownership issue, here are your actual options: The M1 serial number is cryptographically linked to