Apple has made watchOS 27.0.1 available for all Apple Watch models that support watchOS 27. This follows an initial release last week that was limited to Apple Watch Series 12 and Apple Watch Ultra 4.
The watchOS 27.0.1 update primarily provides bug fixes, specifically addressing an issue that could cause some Apple Watch devices to restart unexpectedly. The release notes for this update have not changed since its initial rollout.
The build number for today's release of watchOS 27.0.1 is 24R365, which is identical to the build released last week for the Apple Watch Series 12 and Apple Watch Ultra 4. This indicates no changes to the software itself, only its distribution.
In addition to watchOS 27.0.1, Apple also released several other operating system updates today. These include iOS 27.0.1, iPadOS 27.0.1, visionOS 27.0.1, iOS 26.7.1, macOS 27.0.1 Golden Gate, macOS Tahoe 26.7.1, and macOS Sequoia 15.8.1. These updates also contain bug fixes and security improvements, with iOS 27.0.1 specifically addressing a Face ID restart issue on some iPhone 18 Pro models.
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Apple has expanded the watchOS 27.0.1 update to include all Apple Watch models compatible with watchOS 27. This update addresses an issue causing unexpected device restarts.