watchOS 4.3

watchOS

Version

4.3

Build ID

15T5199f

File Size

324.48 MB

Release Date

2018-03-06T18:08:19Z

Update Type

Normal release

Delta update - requires 4.2 installed first.

Download OTA

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

About This Update

watchOS 4.3 (build 15T5199f) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-03-06T18:08:19Z. The update package is 324.48 MB. This is a delta (partial) update that requires 4.2 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 63f1ebc7f32f5bb3166c6a1eb5f4fcb9b11f586d.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-70966-20180306-23BA3BFE-1E53-11E8-B907-CA18564229C9/com_apple_MobileAsset_SoftwareUpdate/63f1ebc7f32f5bb3166c6a1eb5f4fcb9b11f586d.zip