watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5535a

File Size

735.76 MB

Release Date

2019-01-07T18:16:24Z

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 (42mm) →

About This Update

watchOS 5.1.3 (build 16S5535a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-01-07T18:16:24Z. The update package is 735.76 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 2c0116981f10b1ef26aacb47bc487c17e3ea2935.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-30002/A759B88E-1049-11E9-82D7-66B13DF199C7/com_apple_MobileAsset_SoftwareUpdate/2c0116981f10b1ef26aacb47bc487c17e3ea2935.zip