Apple Watch Update Issues and End of Support for Older Models

In January 2025, a server-side misconfiguration briefly prevented owners of Apple Watch Series 4, Series 5, and the first-generation SE from installing watchOS 10.6.1, the latest version of watchOS 10. This incident highlighted a critical issue: failing to update older Apple Watch hardware can lead to functionality loss, even rendering the device unable to connect to a paired iPhone. While Apple swiftly resolved the issue, it underscored the risks of running unsupported software on these devices.

What Went Wrong with the watchOS 10.6.1 Install on Older Apple Watch Models

The problem stemmed from a compatibility value. When Apple released watchOS 11.3, it increased a value used for over-the-air update eligibility checks from 22 to 24, a number associated with newer watchOS 11 builds according to MacRumors. Devices running watchOS 11 were unaffected. However, Series 4, Series 5, and first-generation SE watches, capped at watchOS 10, were no longer recognized as eligible for watchOS 10.6.1 by the update server.

The issue only impacted devices that hadn’t yet installed watchOS 10.6.1 before January 27, 2025 as noted by Macworld. Watches already running the update remained functional.

Apple addressed the misconfiguration server-side, without releasing new software. However, the temporary lockout demonstrated the potential consequences of running outdated software.

Which Apple Watch Models Were Affected by the watchOS Update Issue

The problem affected Apple Watch models limited to watchOS 10 that hadn’t already installed watchOS 10.6.1 when watchOS 11.3 shipped. Specifically:

• Apple Watch Series 4
• Apple Watch Series 5
• Apple Watch SE, first generation

What Actually Breaks When an Older Apple Watch Can’t Update

The most significant consequence is pairing failure. During the January 2025 incident, some Series 4, Series 5, and first-generation SE watches running earlier watchOS 10 builds lost the ability to pair with an iPhone according to Macworld and MacRumors. Local apps and workout tracking continued to function, but features requiring Apple’s servers became inaccessible.

A watch that can’t pass Apple’s authentication checks is effectively disconnected from the Apple ecosystem, impacting features like FaceTime, iMessage, and activation on a new iPhone.

Why the Final Update Matters More Than It Seems

watchOS 10.6.1, released on August 19, 2024 per Macworld, is the last update for Series 4, Series 5, and first-generation SE models. This isn’t merely a milestone. it’s the fixed point upon which future functionality depends.

Apple’s servers are constantly evolving. Compatibility values change, and infrastructure is updated. While usually seamless, these changes can render older software incompatible. The January 2025 incident revealed this process and the potential for disruption.

How to Check and Update Your Apple Watch Series 4, Series 5, or SE

Checking your software version is straightforward:

• Uncover your model: Open the Watch app on your paired iPhone, go to General, then About.
• Check your software version: In the Watch app, go to General > Software Update.
• What you’re looking for: Series 4, Series 5, and first-generation SE models should be running watchOS 10.6.1.

To install an update, place your watch on its charger, ensure a stable Wi-Fi connection, and follow the prompts in the Watch app.

What This Means for Older Apple Watch Hardware Going Forward

The January 2025 incident wasn’t a deliberate policy change, but it clearly illustrated the practical implications of end-of-life software support. Apple has confirmed that watchOS 11 will be available on Apple Watch Series 6 or later paired with iPhone XS or later according to Apple Support. This means Series 4, Series 5, and the original SE will not receive further updates.

As Apple’s infrastructure evolves, older models running watchOS 10 will eventually lose access to services. Installing watchOS 10.6.1 now maximizes the lifespan of these devices within the Apple ecosystem.