Apple has seeded the third developer betas of watchOS 26.2 and tvOS 26.2 for testing. The build number for watchOS is 23S5297b, while the tvOS beta is build 23K5046a. This release follows the second beta, which was seeded last week.
It's not yet clear what's new in this third beta for either operating system. Both updates likely contain bug fixes and performance improvements following major software releases.
The watchOS 26 update introduced a significant design refresh with 'Liquid Glass,' an AI-powered 'Workout Buddy,' and smarter proactive assistance through Smart Stack hints. You can find a complete list of changes in the official watchOS 26 release notes. For Apple TV, the tvOS 26 update brought the Liquid Glass design to the big screen, alongside functional enhancements to Apple Music Sing and FaceTime.
To update to the latest beta of watchOS, use the Watch app on your paired iPhone. Developers can download the tvOS beta restore image from the link below.