watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5535a

File Size

76.6 MB

Release Date

2019-01-07T18:16:47Z

Update Type

Normal release

Delta update - requires 5.1.2 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 16S5535a) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-01-07T18:16:47Z. The update package is 76.6 MB. This is a delta (partial) update that requires 5.1.2 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 882b4d6b87fd34d093021ba95fec669427788b52.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-29929/FAB4E176-1048-11E9-973F-AF923DF199C7/com_apple_MobileAsset_SoftwareUpdate/882b4d6b87fd34d093021ba95fec669427788b52.zip