watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

63.01 MB

Release Date

2026-03-24T18:34:21Z

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 1 (42mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2026-03-24T18:34:21Z. The update package is 63.01 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 c385af7b89404a568b97c4de20ceafc8f7f1c887.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72936/EC0465F2-B8A3-41FD-B842-EEA9370840AD/com_apple_MobileAsset_SoftwareUpdate/c385af7b89404a568b97c4de20ceafc8f7f1c887.zip