watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S535

File Size

976.17 MB

Release Date

2019-01-22T18:11:32Z

Update Type

Normal release

Delta update - requires 3.1.3 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 16S535) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-01-22T18:11:32Z. The update package is 976.17 MB. This is a delta (partial) update that requires 3.1.3 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 879983089f4d649172c92e46bb89f7d544083590.zip.

Direct URL

http://updates-http.cdn-apple.com/2019WinterFCS/patches/041-17129/ACC0B036-15F6-11E9-B3F3-8CC74CC90A65/com_apple_MobileAsset_SoftwareUpdate/879983089f4d649172c92e46bb89f7d544083590.zip