watchOS 4.3

watchOS

Version

4.3

Build ID

15T5176c

File Size

305.76 MB

Release Date

2018-02-07T18:09:47Z

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 2018-02-07T18:09:47Z. The update package is 305.76 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 acce9f081d76dc2cfcc2f6c249cdd6722a96af2f.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-64220-20180205-5A377FCE-07A2-11E8-8C13-2634315CC82B/com_apple_MobileAsset_SoftwareUpdate/acce9f081d76dc2cfcc2f6c249cdd6722a96af2f.zip