watchOS 5.3.1

watchOS

Version

5.3.1

Build ID

16U600

File Size

991.07 MB

Release Date

2019-08-26T17:15:23Z

Update Type

Normal release

Delta update - requires 3.2.2 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 2019-08-26T17:15:23Z. The update package is 991.07 MB. This is a delta (partial) update that requires 3.2.2 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 d7b326f9e266aa4533d1188f7d29d003a9d17e9e.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SummerFCS/patches/041-91930/6ECA59CA-C501-11E9-96B3-B94D642452FB/com_apple_MobileAsset_SoftwareUpdate/d7b326f9e266aa4533d1188f7d29d003a9d17e9e.zip