watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5523a

File Size

736.41 MB

Release Date

2018-12-10T18:09:57Z

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 2 (42mm) →

About This Update

watchOS 5.1.3 (build 16S5523a) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-12-10T18:09:57Z. The update package is 736.41 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 443b1a383f0f8efebb78d2c3028056cf7f405129.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-20605/F7DC9628-F8DE-11E8-8433-B79B49E44814/com_apple_MobileAsset_SoftwareUpdate/443b1a383f0f8efebb78d2c3028056cf7f405129.zip