watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5523a

File Size

143.76 MB

Release Date

2018-12-10T18:10:10Z

Update Type

Normal release

Delta update - requires 5.1 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 16S5523a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-12-10T18:10:10Z. The update package is 143.76 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 3c63d47aa8b336877b44139624e13579947dcf66.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-21094/AB4512F4-F8DE-11E8-B323-BC2A7129A070/com_apple_MobileAsset_SoftwareUpdate/3c63d47aa8b336877b44139624e13579947dcf66.zip