watchOS 4.3

watchOS

Version

4.3

Build ID

15T5187e

File Size

342.17 MB

Release Date

2018-02-21T18:12:23Z

Update Type

Normal release

Delta update - requires 4.2.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (38mm) →

About This Update

watchOS 4.3 (build 15T5187e) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-02-21T18:12:23Z. The update package is 342.17 MB. This is a delta (partial) update that requires 4.2.3 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 decc6d577509125bd1aca2a498653ad640b1596f.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-70309-20180222-2D1B6528-1341-11E8-BC00-52B970E8E01E/com_apple_MobileAsset_SoftwareUpdate/decc6d577509125bd1aca2a498653ad640b1596f.zip