Apple has released watchOS 27.0.1 to address a bug that can cause certain Apple Watch models to restart unexpectedly during normal use. AppleInsider and other outlets report that affected devices may reboot without warning while performing tasks such as editing watch faces, making calls, using Siri features, opening Apple Maps or the App Store, and recording workouts. Some users also report restarts occurring when the watch is idle.
The update is described as a targeted fix for specific models, rather than a change covering the entire Apple Watch lineup. MacRumors, 9to5Mac, and AppleInsider agree that watchOS 27.0.1 applies to Apple Watch Series 12 and Apple Watch Ultra 4. MacRumors adds that installation is done via the Settings app on the watch or through the Apple Watch app on a paired iPhone, and that it requires the watch to be on its charger with more than 50% battery. All sources frame the release as a minor, bug-fixing update issued shortly after watchOS 27 became generally available.
