watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S535

File Size

740.74 MB

Release Date

2019-01-22T18:11:36Z

Update Type

Normal release

Delta update - requires 4.3 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 16S535) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-01-22T18:11:36Z. The update package is 740.74 MB. This is a delta (partial) update that requires 4.3 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 48af80ba52a6ed210b98255b11cf4d65cab0bd30.zip.

Direct URL

http://updates-http.cdn-apple.com/2019WinterFCS/patches/041-17014/79E740E4-15F6-11E9-ABA1-AAC24CC90A65/com_apple_MobileAsset_SoftwareUpdate/48af80ba52a6ed210b98255b11cf4d65cab0bd30.zip