watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

494.74 MB

Release Date

2026-03-24T18:33:20Z

Update Type

Normal release

Delta update - requires 5.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 2 (42mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2026-03-24T18:33:20Z. The update package is 494.74 MB. This is a delta (partial) update that requires 5.0 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 b75a8f517388fea227cbe3f0e83b7876e8869f3f.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72893/9CAACC9D-168C-410C-B5DB-FE7E132649AE/com_apple_MobileAsset_SoftwareUpdate/b75a8f517388fea227cbe3f0e83b7876e8869f3f.zip