watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5531a

File Size

735.73 MB

Release Date

2018-12-19T21:06:16Z

Update Type

Normal release

Delta update - requires 4.3.1 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 16S5531a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-12-19T21:06:16Z. The update package is 735.73 MB. This is a delta (partial) update that requires 4.3.1 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 ca98aca146cc38cb90f19a76ec58267b421a10dc.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-26793/172AEB08-022E-11E9-B4A5-9117B40D2538/com_apple_MobileAsset_SoftwareUpdate/ca98aca146cc38cb90f19a76ec58267b421a10dc.zip