watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5531a

File Size

162.5 MB

Release Date

2018-12-19T21:06:41Z

Update Type

Normal release

Delta update - requires 5.1 installed first.

Download OTA

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

About This Update

watchOS 5.1.3 (build 16S5531a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2018-12-19T21:06:41Z. The update package is 162.5 MB. This is a delta (partial) update that requires 5.1 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 3f1a248d8721e2ca4696e46e58641fcce1e8563a.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-26703/DFEC7BDE-022D-11E9-8B81-B53D040A9225/com_apple_MobileAsset_SoftwareUpdate/3f1a248d8721e2ca4696e46e58641fcce1e8563a.zip