watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S535

File Size

146.25 MB

Release Date

2019-01-22T18:13:14Z

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 (40mm) →

About This Update

watchOS 5.1.3 (build 16S535) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-01-22T18:13:14Z. The update package is 146.25 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 81c86755523717ecd72045cb9f985c878ee57a62.zip.

Direct URL

http://updates-http.cdn-apple.com/2019WinterFCS/patches/041-18326/3BF49574-15F7-11E9-B027-EBD54CC90A65/com_apple_MobileAsset_SoftwareUpdate/81c86755523717ecd72045cb9f985c878ee57a62.zip