watchOS 4.3

watchOS

Version

4.3

Build ID

15T5176c

File Size

305.8 MB

Release Date

2018-02-07T18:09:46Z

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 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 2018-02-07T18:09:46Z. The update package is 305.8 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 8151c00915edd0dec47d366c9f235a0d6249a30e.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-64175-20180205-9E57119C-07A2-11E8-A5D7-C43E315CC82B/com_apple_MobileAsset_SoftwareUpdate/8151c00915edd0dec47d366c9f235a0d6249a30e.zip