Apple has seeded the second developer betas of watchOS 26.3, tvOS 26.3, and visionOS 26.3 for testing. These updates arrive alongside the latest betas for iOS and iPadOS.
The build numbers for the new software are 23S5600d for watchOS, 23N5602d for visionOS, and 23K5600b for tvOS.
This beta cycle follows the public release of version 26.2 in December, which introduced several notable features across Apple's platforms. watchOS 26.2 added Enhanced Safety Alerts for natural disasters, while visionOS 26.2 expanded Travel Mode to support cars and buses. The tvOS 26.2 update brought guest profiles that do not require an Apple ID, simplifying shared viewing.
We are currently exploring these new builds to see what improvements Apple has included. Given the timing, we expect a mix of bug fixes and stability enhancements, though new features may still appear.
Developers can download the new software from the link below or by using the Software Update menu in System Settings on their respective devices.