watchOS 5.3.1

watchOS

Version

5.3.1

Build ID

16U600

File Size

1005.86 MB

Release Date

2019-08-26T17:15:19Z

Update Type

Normal release

Delta update - requires 3.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 5.3.1 (build 16U600) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-08-26T17:15:19Z. The update package is 1005.86 MB. This is a delta (partial) update that requires 3.0 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 99297a569d4111feaa43ae4be3fd61bb9e4229a6.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SummerFCS/patches/041-91847/F0B8D2F0-C500-11E9-9EF5-971B8E487A4D/com_apple_MobileAsset_SoftwareUpdate/99297a569d4111feaa43ae4be3fd61bb9e4229a6.zip