watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

85.82 MB

Release Date

2026-03-24T18:37:05Z

Update Type

Normal release

Delta update - requires 5.3.2 installed first.

Download OTA

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

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2026-03-24T18:37:05Z. The update package is 85.82 MB. This is a delta (partial) update that requires 5.3.2 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 9d9d2912d3845ff361a6569ca8ef40719e7df69a.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72973/67FFC66C-0C2D-48CB-884B-7BA8B3F673D6/com_apple_MobileAsset_SoftwareUpdate/9d9d2912d3845ff361a6569ca8ef40719e7df69a.zip