watchOS 5.3

watchOS

Version

5.3

Build ID

16U5566a

File Size

99.09 MB

Release Date

2019-07-09T17:20:08Z

Update Type

Normal release

Delta update - requires 5.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm) →

About This Update

watchOS 5.3 (build 16U5566a) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-07-09T17:20:08Z. The update package is 99.09 MB. This is a delta (partial) update that requires 5.3 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 71debf2b04b5872178b372f7a90cd6215f141108.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SummerSeed/patches/041-78653/EB9F24C8-9DC7-11E9-84F7-D2AF9E15B375/com_apple_MobileAsset_SoftwareUpdate/71debf2b04b5872178b372f7a90cd6215f141108.zip