watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5523a

File Size

735.56 MB

Release Date

2018-12-10T18:10:09Z

Update Type

Normal release

Delta update - requires 4.3.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 5.1.3 (build 16S5523a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-12-10T18:10:09Z. The update package is 735.56 MB. This is a delta (partial) update that requires 4.3.2 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 c700653c65a288b45401e4fdd129636717646d53.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-20647/F4C63EDA-F8DE-11E8-AE0D-D9936ECE9EC5/com_apple_MobileAsset_SoftwareUpdate/c700653c65a288b45401e4fdd129636717646d53.zip