watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S535

File Size

971.25 MB

Release Date

2019-01-22T18:11:12Z

Update Type

Normal release

Delta update - requires 3.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (38mm) →

About This Update

watchOS 5.1.3 (build 16S535) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-01-22T18:11:12Z. The update package is 971.25 MB. This is a delta (partial) update that requires 3.0 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 b637ead402f3205634dedb07632d709b057b76cc.zip.

Direct URL

http://updates-http.cdn-apple.com/2019WinterFCS/patches/041-16562/E6F91ADC-15F5-11E9-A150-DBB64CC90A65/com_apple_MobileAsset_SoftwareUpdate/b637ead402f3205634dedb07632d709b057b76cc.zip