watchOS 5.3

watchOS

Version

5.3

Build ID

16U5545c

File Size

111.64 MB

Release Date

2019-06-11T17:14:06Z

Update Type

Normal release

Delta update - requires 5.2.1 installed first.

Download OTA

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

About This Update

watchOS 5.3 (build 16U5545c) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-06-11T17:14:06Z. The update package is 111.64 MB. This is a delta (partial) update that requires 5.2.1 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 9d20aadfc75456e15f5068fe8735b7af443437f3.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-72955/6FE95504-88A7-11E9-B059-4AA54B7D6DB9/com_apple_MobileAsset_SoftwareUpdate/9d20aadfc75456e15f5068fe8735b7af443437f3.zip