watchOS 4.3

watchOS

Version

4.3

Build ID

15T5187e

File Size

317.75 MB

Release Date

2018-02-21T18:11:19Z

Update Type

Normal release

Delta update - requires 4.2 installed first.

Download OTA

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

About This Update

watchOS 4.3 (build 15T5187e) is an official Apple over-the-air update for the Apple Watch (38mm), released on 2018-02-21T18:11:19Z. The update package is 317.75 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 813d289fa6f9ba79640f8ab44c6db335f7e09893.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-70213-20180222-84608A5C-1341-11E8-97AB-E3C770E8E01E/com_apple_MobileAsset_SoftwareUpdate/813d289fa6f9ba79640f8ab44c6db335f7e09893.zip