watchOS 4.3

watchOS

Version

4.3

Build ID

15T5176c

File Size

355.12 MB

Release Date

2018-02-07T18:09:42Z

Update Type

Normal release

Delta update - requires 4.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (38mm) →

About This Update

watchOS 4.3 (build 15T5176c) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-02-07T18:09:42Z. The update package is 355.12 MB. This is a delta (partial) update that requires 4.0 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 64d13c53973bb8c0e570ed953f21aa28e6b9c3a9.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-64182-20180205-78F37804-07A3-11E8-91E9-EA57315CC82B/com_apple_MobileAsset_SoftwareUpdate/64d13c53973bb8c0e570ed953f21aa28e6b9c3a9.zip