watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

58.02 MB

Release Date

2026-03-24T18:34:27Z

Update Type

Normal release

Delta update - requires 5.3.6 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2026-03-24T18:34:27Z. The update package is 58.02 MB. This is a delta (partial) update that requires 5.3.6 to already be installed on the device - it cannot be applied from scratch. This update is currently signed by Apple, so it can be applied directly from Settings › General › Software Update.

The OTA payload file is 921a984f796ee51fa85a80c7ac6a194a3f46e90e.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72897/C925FA87-4E15-47B1-97FC-F32A3D7AC84B/com_apple_MobileAsset_SoftwareUpdate/921a984f796ee51fa85a80c7ac6a194a3f46e90e.zip