If you bought a used MacBook and it is locked to a previous owner’s serial number/account, changing the serial number isn't the fix. You must:
There is only one method to legitimately change the serial number on an M1 logic board: using available only to Apple Stores and Apple Authorized Service Providers. This software, which has evolved from the older "Blank Board Serializer" (BBS) to more modern tools, can authenticate with Apple’s servers to securely provision a new serial number onto a replacement logic board. This process is part of a secure chain that ensures the board is legitimate and that the device remains fully functional with all Apple services.
If your M1 MacBook lacks a valid serial number due to a faulty repair, your computer will still boot, but you will experience severe software limitations: macbook m1 change serial number
According to Beetstech , the code represents manufacturing location, year, week, and a unique identifier.
If a software exploit successfully spoofs a serial number locally inside macOS, the illusion breaks the moment you log into an Apple ID. Apple's servers will flag the account for suspicious activity, resulting in a permanent ban of your Apple ID. What Should You Do Instead? If you bought a used MacBook and it
| Aspect | Pre‑T2 / Intel Macs (2009‑2017) | M1 Macs (2020‑present) | |---|---|---| | | None / T1 / T2 (Intel) | Apple Silicon (T2 functionality integrated) | | Serial Number Storage | SPI flash / SMC | Cryptographically sealed firmware | | DIY Modification Tools | Blank Board Serializer (BBS) available | None (officially supported tools only) | | Compatibility with BBS | ✅ Yes (2009‑2017 models) | ❌ No | | Authorized Service Tool | AST / BBS | AST / Apple Configurator 2 | | Risk of Bricking | Moderate | Very high | | Warranty Impact | Voided immediately | Voided immediately + potential service refusal |
These programs are usually malware designed to steal your data or brick your device. This process is part of a secure chain
: Tampering with these identifiers can lead to iCloud activation locks or prevent the device from accessing official Apple services like iMessage or FaceTime. Official Alternatives How to change MacBook M1 Mode serial number
: The serial number is stored inside the M1 chip and is tied to other critical hardware components like the Wi-Fi data. Rewrite Required
It is printed on the underside of the MacBook chassis.