In theory, you could desolder the M1 chip itself and replace it with a new, blank M1 chip, then program a fresh GSC ID. This is impossible for 99.9% of people, as the M1 is a BGA chip with 1,600+ solder balls, and Apple does not sell blank M1 chips.
The M1 Mac has a hidden, read-only system volume called "Dallas." This contains the system's "firmware" in the traditional sense. Even if you could hypothetically change the serial in memory, the Dallas volume would immediately detect the mismatch and force the Mac into a recovery loop (Error code: -2003F or "System critical error"). macbook m1 change serial number
. Instead of trying to force a serial number change on your own, take advantage of Apple's official service channels. Apple Stores and Authorized Service Providers can resolve most serial number issues quickly and often at no charge. In theory, you could desolder the M1 chip
