Apple’s decision to leave several relatively recent Apple Watch models off watchOS 27 highlights how central AI has become to its software roadmap. The company says the update is built around features that require stronger processing power, especially for Siri AI and Apple Intelligence.
That shift means the latest software is not defined only by age or release cycle, but by whether a watch can deliver the experience Apple now wants across its wearable lineup. Apple told GSM Arena that it wants users to get the best possible experience from the new system, while older hardware is seen as too limited to meet that standard.
AI capabilities are driving the change
Siri AI is one of the headline features in watchOS 27, with Apple positioning the assistant as smarter, more context-aware, and more natural when used from the wrist. Those improvements depend on newer hardware that can handle Apple Intelligence more effectively.
Apple Watch and Health Product Marketing Manager Cait Dooley reinforced that point by saying Apple wants all users to have the best experience on watchOS 27. Her comments underline that the cutoff is tied not only to device age, but also to technical readiness for new AI-powered functions.
Which models are left out
The official compatibility list excludes Apple Watch Series 6, Apple Watch Series 7, Apple Watch Series 8, Apple Watch SE 2, and Apple Watch Ultra 1. These models will not receive watchOS 27, even though some are still considered relatively new by users.
Support is being reserved for newer devices, including Apple Watch Series 9, Series 10, Series 11, Apple Watch Ultra 2, Apple Watch Ultra 3, and Apple Watch SE 3. That split shows Apple is drawing a clear line between older chips and the hardware it believes can fully support the next wave of smartwatch features.
What still works for affected users
Apple says the watches that miss out on watchOS 27 will still remain usable and can continue pairing with iPhones running iOS 27. Users will keep the core functions they already rely on, even if they do not get the latest software layer.
Those devices will also continue receiving security updates for some time, although they will not gain the new features introduced in the next major watchOS release. That approach softens the impact, but it still leaves owners of unsupported models outside Apple’s newest software experience.
A major shift in Apple Watch support
The move stands out because several affected models are not yet five years old. The most notable case is the first-generation Apple Watch Ultra, which arrived in 2022 and is now being dropped from the next watchOS cycle.
For many users, that makes the decision feel abrupt, especially since these models received watchOS 26 last year. Apple’s explanation makes clear that the company is prioritizing the demands of AI-first features over simple generational continuity.
As watchOS 27 arrives, the message from Apple is direct: the next phase of the Apple Watch experience will belong to devices that can handle more advanced AI, and older models will have to stay on the sidelines.
