The is not a cosmetic version bump. It is a critical maintenance release that materially improves the safety, stability, and speed of your M1-based hardware. The patch to the USB stack alone is worth the two minutes of installation time. Final Warning: The "No Downgrade" Policy Once you install v203 UPD, there is no going back. Manufacturers have locked the rollback feature via e-fuses because earlier versions lacked the new security patches. Attempting to force an older firmware via JTAG will void your warranty.
This article is for informational purposes. Always consult your device’s official manual before performing firmware updates. The author is not responsible for data loss or hardware damage. m1 firmware update v203 upd
Unlike operating system updates, firmware flashes rewrite the core instructions of your hardware. A power outage or incorrect file during this process can "brick" your device (render it unusable). The is not a cosmetic version bump