Although watchOS 27 drops support for several older Apple Watch models, Apple has confirmed to 9to5Mac that one compatible model was mistakenly left out of its official list. Here are the details.
Apple Watch Series 9 will run watchOS 27
Right after Apple wrapped up its WWDC 2026 keynote, the company updated its website with details about each new system announced during the event.
For many Apple Watch users, the watchOS 27 page included a surprisingly shorter compatibility list than watchOS 26.
According to the page, watchOS 27 supports the Apple Watch SE 3, Apple Watch Series 11 and Series 10, and Apple Watch Ultra 3 and Ultra 2. In practice, that would mean the update drops support for the Apple Watch SE 2, Apple Watch Series 6, Series 7, Series 8, Series 9, and the first-generation Apple Watch Ultra.
