watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

73.26 MB

Release Date

2026-03-24T18:36:14Z

Update Type

Normal release

Delta update - requires 5.3.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2026-03-24T18:36:14Z. The update package is 73.26 MB. This is a delta (partial) update that requires 5.3.1 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 574b4a28da7d6023987f90efb3e29463b5a6373d.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72846/783D0BE7-D343-4ABD-A1AE-DB8F28165667/com_apple_MobileAsset_SoftwareUpdate/574b4a28da7d6023987f90efb3e29463b5a6373d.zip