watchOS 5.3

watchOS

Version

5.3

Build ID

16U5566a

File Size

143.08 MB

Release Date

2019-07-09T17:20:25Z

Update Type

Normal release

Delta update - requires 5.2.1 installed first.

Download OTA

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

About This Update

watchOS 5.3 (build 16U5566a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-07-09T17:20:25Z. The update package is 143.08 MB. This is a delta (partial) update that requires 5.2.1 to already be installed on the device - it cannot be applied from scratch. This update is no longer signed by Apple, meaning it can no longer be downloaded and applied on-device through Settings.

The OTA payload file is af8d66789cb860e3e03ff47d7a9847dea7730354.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SummerSeed/patches/041-78603/FE9C6F0E-9DC7-11E9-B25C-C7B49E15B375/com_apple_MobileAsset_SoftwareUpdate/af8d66789cb860e3e03ff47d7a9847dea7730354.zip