watchOS 5.3.1

watchOS

Version

5.3.1

Build ID

16U600

File Size

485.35 MB

Release Date

2019-08-26T17:16:30Z

Update Type

Normal release

Delta update - requires 5.1.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (42mm) →

About This Update

watchOS 5.3.1 (build 16U600) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2019-08-26T17:16:30Z. The update package is 485.35 MB. This is a delta (partial) update that requires 5.1.1 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 a752754b5bb05136f91bc76f25510fd3bebb3f25.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SummerFCS/patches/041-91896/3EB44C5A-C501-11E9-83EA-CDA81843A1CC/com_apple_MobileAsset_SoftwareUpdate/a752754b5bb05136f91bc76f25510fd3bebb3f25.zip