watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5531a

File Size

194.46 MB

Release Date

2018-12-19T21:06:31Z

Update Type

Normal release

Delta update - requires 5.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm) →

About This Update

watchOS 5.1.3 (build 16S5531a) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2018-12-19T21:06:31Z. The update package is 194.46 MB. This is a delta (partial) update that requires 5.0 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 64674246848f6b336331e8debce5300e0156f9b4.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-26727/0A250434-022E-11E9-8E35-A62B7421F2F0/com_apple_MobileAsset_SoftwareUpdate/64674246848f6b336331e8debce5300e0156f9b4.zip