watchOS 27 Is Officially Dropping Support for 5 Apple Watch Models
Every year, Apple pushes the boundaries of what its software can do — and every year, some older hardware gets left behind. With the announcement of watchOS 27, Apple has confirmed that five Apple Watch models will no longer receive software updates. If you own one of the affected watches, this is the end of the road for new features, performance improvements, and — critically — security patches tied to the latest OS release.
So why exactly are these five models being cut? And what does it mean for owners going forward? Let's break it all down.
Which Apple Watch Models Will Not Support watchOS 27?
Apple has confirmed that the following five Apple Watch models will be incompatible with watchOS 27:
- Apple Watch Series 4 — Released in 2018, this model introduced the modern design language Apple still uses today, but its aging S4 chip simply cannot handle what watchOS 27 demands.
- Apple Watch Series 5 — Always-on display was a landmark feature here, but the underlying S5 processor shares the same silicon limitations as its predecessor.
- Apple Watch Series 6 — One of the most beloved generations thanks to its blood oxygen sensor, but the S6 chip falls short of the hardware thresholds required for Apple Intelligence.
- Apple Watch SE (1st Generation) — Apple's budget-friendly entry point from 2020 was built on efficiency rather than power, and that compromise now costs it long-term software support.
- Apple Watch Series 7 — Perhaps the most surprising omission for many users, the Series 7 brought a larger display and faster charging, yet its S7 chip is no longer sufficient for the AI-driven demands of watchOS 27.
If you own any of these models, your watch will continue to function normally — but it will remain on watchOS 26 and will not receive the new features or system-level updates that come with the next generation of watchOS.
The Real Reason: Apple Intelligence and Siri AI
The short answer for why these models are being dropped comes down to one phrase: Apple Intelligence. watchOS 27 is not simply a refinement of its predecessor — it is a significant leap forward in on-device artificial intelligence, and that leap requires serious processing power.
Apple's latest Siri AI upgrades are deeply integrated into watchOS 27 at the operating system level. These are not surface-level tweaks to how Siri responds to voice commands. Instead, Apple Intelligence in watchOS 27 enables contextual awareness, real-time health data interpretation, predictive notifications, and a more conversational, capable Siri that understands complex multi-step requests without needing to relay information to the cloud.
Running these features entirely on-device — which is central to Apple's privacy-first approach — demands a chip that can handle neural engine workloads continuously and efficiently. The chips inside the five dropped models simply were not built for this level of sustained AI processing. Forcing those features onto incompatible hardware would result in overheating, severe battery drain, or outright system instability.
What Hardware Does watchOS 27 Actually Require?
watchOS 27 is compatible with Apple Watch models powered by the S8 chip or later. That means the following watches are in the clear:
- Apple Watch Series 8
- Apple Watch Series 9
- Apple Watch Series 10
- Apple Watch Ultra (1st and 2nd generation)
- Apple Watch SE (2nd Generation)
The S8 chip introduced a key threshold in Apple Watch hardware evolution: a significantly more capable Neural Engine, improved thermal efficiency, and the ability to run machine learning models persistently in the background without draining the battery in hours. That foundation is what allows watchOS 27 to do what it does, and it's a bar the older five models simply cannot clear.
Is This Normal? How Apple Usually Handles Support Cutoffs
For those surprised by this news, it's worth putting it in historical context. Apple has always had a defined lifecycle for its hardware, and Apple Watch has generally received around five to six years of software support — sometimes more, sometimes slightly less depending on the chipset generation.
The Series 4, for example, launched in 2018, meaning it received approximately seven years of watchOS updates before being retired with watchOS 27. That is actually a generous support window by any industry standard. The Series 7, dropped in 2025 or 2026, sees a shorter run, which has understandably frustrated some users who invested in that model relatively recently.
However, Apple's pace of AI integration has accelerated dramatically. The jump from traditional software features to deep, persistent, on-device machine learning is not a gradual evolution — it is a architectural shift. That shift inevitably moves the minimum hardware bar upward faster than in previous cycles.
What Should Affected Apple Watch Owners Do?
If your watch is on the dropped list, you have a few practical options to consider.
- Stay on watchOS 26: Your watch will continue to work perfectly well for standard fitness tracking, notifications, heart rate monitoring, and most daily tasks. watchOS 26 itself is a capable and stable platform, and Apple will provide some security updates for a limited time.
- Upgrade to a supported model: If you want access to Apple Intelligence features, the watchOS 27 health upgrades, and the new Siri AI capabilities, upgrading to at least an Apple Watch SE (2nd gen) or Series 8 is the minimum path forward.
- Watch for trade-in deals: Apple and major carriers frequently offer trade-in promotions when new software cycles begin. Owners of dropped models often find attractive upgrade pricing around WWDC season and the fall hardware launch window.
The Bottom Line on watchOS 27 Compatibility
watchOS 27 dropping five Apple Watch models is not a surprise move — it is the predictable outcome of Apple making a major bet on Apple Intelligence and on-device Siri AI as the future of the Apple Watch experience. The hardware requirements for that future are real, and older chips cannot meet them without compromising the experience Apple wants to deliver.
For most affected owners, the watches in question have already delivered years of reliable use. The decision now is whether staying on watchOS 26 is sufficient or whether the new AI-driven features in watchOS 27 make an upgrade worth considering. Either way, understanding why the cutoff happened makes that decision a lot easier to navigate.