watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5535a

File Size

145.66 MB

Release Date

2019-01-07T18:16:24Z

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 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 145.66 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 fb8a619cd17e595b531e22cff943da159d0b418c.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-29963/6DF214CE-1049-11E9-B251-DAA63DF199C7/com_apple_MobileAsset_SoftwareUpdate/fb8a619cd17e595b531e22cff943da159d0b418c.zip