I understand you're looking for information about changing the serial number on an M1 MacBook. However, I need to provide an important caution upfront:
Are you looking to change the serial number for or to fix a "Serial Number Unavailable" error? Identify your MacBook Air model - Apple Support (PH) macbook m1 change serial number
If you are trying to change it for software licensing or privacy, be aware that most modern macOS security features (like FileVault and iCloud) are cryptographically linked to the original hardware ID. I understand you're looking for information about changing
: Even in official repairs, Apple usually flashes the logic board once; once set, it is generally considered permanent for the life of that specific board. Why People Attempt It Users typically look for this solution after a logic board replacement : Even in official repairs, Apple usually flashes
: If your Mac shows "Unavailable" after a third-party repair, it usually means the repairer did not have the tools to serialize the board. Verifying Authenticity
On Intel Macs, you could boot into single-user mode (Cmd+S) or use nvram commands. On M1, single-user mode is disabled by default. You must boot into (hold power button) and then run Startup Security Utility to reduce security. Even then, the nvram command is heavily restricted.