watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

145.42 MB

Release Date

2026-03-24T18:33:53Z

Update Type

Normal release

Delta update - requires 5.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (38mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2026-03-24T18:33:53Z. The update package is 145.42 MB. This is a delta (partial) update that requires 5.2 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 f023c9b8e74a13cbb0aac9cfc6512e93d0ba5a15.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72909/8EA3CE7C-7440-435A-BF5F-678F8E54925A/com_apple_MobileAsset_SoftwareUpdate/f023c9b8e74a13cbb0aac9cfc6512e93d0ba5a15.zip