watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5531a

File Size

751.12 MB

Release Date

2018-12-19T21:06:25Z

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 3 (38mm) →

About This Update

watchOS 5.1.3 (build 16S5531a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-12-19T21:06:25Z. The update package is 751.12 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 ea99cc8d3a68d353e3770ad676d7698d697b81f7.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-26743/13C2BF18-022E-11E9-9878-A0E67642831D/com_apple_MobileAsset_SoftwareUpdate/ea99cc8d3a68d353e3770ad676d7698d697b81f7.zip