watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

61.89 MB

Release Date

2026-03-24T18:34:23Z

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 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 2026-03-24T18:34:23Z. The update package is 61.89 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 ef12f16e6acae5b7b17e883692c3a18c7523a45d.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72847/17A6ACA2-C3A8-493C-881A-9E244767CB42/com_apple_MobileAsset_SoftwareUpdate/ef12f16e6acae5b7b17e883692c3a18c7523a45d.zip