watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5531a

File Size

734.95 MB

Release Date

2018-12-19T21:06:13Z

Update Type

Normal release

Delta update - requires 4.3.2 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 16S5531a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-12-19T21:06:13Z. The update package is 734.95 MB. This is a delta (partial) update that requires 4.3.2 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 8e9b55b9e89d14b615692a3c3ba488e571bf521e.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-26687/1D0A2732-022E-11E9-9BAF-B20D6504AF5C/com_apple_MobileAsset_SoftwareUpdate/8e9b55b9e89d14b615692a3c3ba488e571bf521e.zip