watchOS 4.3

watchOS

Version

4.3

Build ID

15T5199f

File Size

324.85 MB

Release Date

2018-03-06T18:08:12Z

Update Type

Normal release

Delta update - requires 4.2 installed first.

Download OTA

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

About This Update

watchOS 4.3 (build 15T5199f) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-03-06T18:08:12Z. The update package is 324.85 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 c604ac7757cb482af5d5910933b0874aedba7085.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-71086-20180306-474C438C-1E53-11E8-B155-F71D564229C9/com_apple_MobileAsset_SoftwareUpdate/c604ac7757cb482af5d5910933b0874aedba7085.zip