watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S535

File Size

188.14 MB

Release Date

2019-01-22T18:13:28Z

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 (44mm) →

About This Update

watchOS 5.1.3 (build 16S535) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-01-22T18:13:28Z. The update package is 188.14 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 4e4418d36eddf5ae5821faa54ff147529d72086d.zip.

Direct URL

http://updates-http.cdn-apple.com/2019WinterFCS/patches/041-17237/CE14FF26-15F6-11E9-A30F-DDCA4CC90A65/com_apple_MobileAsset_SoftwareUpdate/4e4418d36eddf5ae5821faa54ff147529d72086d.zip