Your Apple Watch Probably Doesn't Support watchOS 27

Apple has confirmed that watchOS 27 will be compatible with the Apple Watch Series 9, correcting a previous omission from the official list provided to 9to5Mac. However, the update marks a shift in support, as Apple Watch models that are three years old will no longer receive OS updates. While the Series 9 remains supported, several older Apple Watch models are now officially dropped from the compatibility list for the latest watchOS 27 software.