watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5531a

File Size

1.33 GB

Release Date

2018-12-19T21:06:37Z

Update Type

Normal release

Download OTA

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

About This Update

watchOS 5.1.3 (build 16S5531a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2018-12-19T21:06:37Z. The update package is 1.33 GB. This is a full OTA update that can be applied from any compatible base version. 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 ddca40d08c5ad004ce49a9494241626c85dbb605.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-26828/0E046282-0235-11E9-96DC-DB763999E337/com_apple_MobileAsset_SoftwareUpdate/ddca40d08c5ad004ce49a9494241626c85dbb605.zip