watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

466.02 MB

Release Date

2026-03-24T18:36:27Z

Update Type

Normal release

Delta update - requires 5.1.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (44mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2026-03-24T18:36:27Z. The update package is 466.02 MB. This is a delta (partial) update that requires 5.1.3 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 c4cb9e3ed868d7ae21991066069699397db775ca.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72926/22CE07EB-6802-4AF9-B730-DDBD14205E03/com_apple_MobileAsset_SoftwareUpdate/c4cb9e3ed868d7ae21991066069699397db775ca.zip