M1 Change Serial Number - Macbook

If you only need to change the serial number for software testing inside a Virtual Machine (VM):

There are a few methods that have been reported to change the serial number on an M1 MacBook: macbook m1 change serial number

If you are experiencing issues with a missing serial number after a repair, the best course of action is to return it to the Apple Authorized Service Provider to have it correctly flashed. How to change MacBook M1 Mode serial number If you only need to change the serial