watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

522.07 MB

Release Date

2026-03-24T18:36:39Z

Update Type

Normal release

Delta update - requires 5.0 installed first.

Download OTA

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

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2026-03-24T18:36:39Z. The update package is 522.07 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 aadecfdc438af39f9ae7ca179d56424031ea229e.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72870/65A4B6EA-4B1D-4D78-98F9-1503C47C8373/com_apple_MobileAsset_SoftwareUpdate/aadecfdc438af39f9ae7ca179d56424031ea229e.zip