watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5523a

File Size

164.87 MB

Release Date

2018-12-10T18:10:39Z

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, LTE) →

About This Update

watchOS 5.1.3 (build 16S5523a) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2018-12-10T18:10:39Z. The update package is 164.87 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 f820c0ccd511a750724b4ffc854a1ff99a17fcdf.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-21074/A172F91C-F8DE-11E8-BA0C-EC060C1CEA2D/com_apple_MobileAsset_SoftwareUpdate/f820c0ccd511a750724b4ffc854a1ff99a17fcdf.zip