watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S535

File Size

748.76 MB

Release Date

2019-01-22T18:11:16Z

Update Type

Normal release

Delta update - requires 4.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (38mm) →

About This Update

watchOS 5.1.3 (build 16S535) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-01-22T18:11:16Z. The update package is 748.76 MB. This is a delta (partial) update that requires 4.2 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 2533cb43248d76ba80bc1275e41ef5988368edee.zip.

Direct URL

http://updates-http.cdn-apple.com/2019WinterFCS/patches/041-16970/6AE1B00C-15F6-11E9-922B-FBC04CC90A65/com_apple_MobileAsset_SoftwareUpdate/2533cb43248d76ba80bc1275e41ef5988368edee.zip