watchOS 4.3

watchOS

Version

4.3

Build ID

15T5209a

File Size

360.61 MB

Release Date

2018-03-12T20:07:38Z

Update Type

Normal release

Delta update - requires 4.2.2 installed first.

Download OTA

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

About This Update

watchOS 4.3 (build 15T5209a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-03-12T20:07:38Z. The update package is 360.61 MB. This is a delta (partial) update that requires 4.2.2 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 363a66a89dc32a3285ea435e793c64f434ab6373.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-72799-20180221-7CB9224A-23D2-11E8-B338-A66A5B3DAFD9/com_apple_MobileAsset_SoftwareUpdate/363a66a89dc32a3285ea435e793c64f434ab6373.zip