watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S535

File Size

749.54 MB

Release Date

2019-01-22T18:11:35Z

Update Type

Normal release

Delta update - requires 4.2.2 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 16S535) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-01-22T18:11:35Z. The update package is 749.54 MB. This is a delta (partial) update that requires 4.2.2 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 994d74490f8d100ae73a71a881807b23ef2967f3.zip.

Direct URL

http://updates-http.cdn-apple.com/2019WinterFCS/patches/041-27929/A0EA1B84-15F7-11E9-8122-E5E84CC90A65/com_apple_MobileAsset_SoftwareUpdate/994d74490f8d100ae73a71a881807b23ef2967f3.zip