Apple has released watchOS 27.0.1, a minor software update for the watchOS 27 operating system introduced last week. The update focuses on bug fixes, including a problem that could cause an Apple Watch to restart unexpectedly.

Unexpected restarts can interrupt an Apple Watch session and may prevent users from completing an activity or checking information when they need it. Apple’s release notes identify the restart issue as one of the problems addressed by watchOS 27.0.1, although the company did not provide additional details about how often it occurred or which models were affected.

What watchOS 27.0.1 fixes

The main documented change in watchOS 27.0.1 is a fix for an issue that could trigger unexpected Apple Watch restarts. Apple also describes the release generally as a bug-fix update, without listing further specific changes in the available release notes.

Because watchOS 27.0.1 follows the initial watchOS 27 release by only a short time, it appears intended to address problems identified after the major operating system update became available. Users who experienced unexplained restarts may want to install the update when it becomes available for their watch.

How to install the update

Apple Watch owners can check for watchOS 27.0.1 in the watch’s Settings app. The update can also be accessed through the Apple Watch app on a connected iPhone.

Apple requires the watch to be placed on its charger during installation. The device must also have more than 50 percent battery before the software can be installed. These requirements are designed to ensure the watch has sufficient power and remains connected to its charger throughout the update process.

What Apple Watch users should know

watchOS 27.0.1 is a maintenance release rather than a new major version. It does not change the watchOS release cycle; instead, it provides an early correction for a reliability problem in watchOS 27.

Users can check their current software version from the Apple Watch’s Settings app. Installing the update requires access to either the watch itself or a paired iPhone running the Apple Watch app. Apple’s release notes specifically call out the restart bug, making the update particularly relevant for owners who have encountered that behavior since installing watchOS 27.