watchOS 4.3

watchOS

Version

4.3

Build ID

15T5199f

File Size

324.42 MB

Release Date

2018-03-07T02:04:19Z

Update Type

Normal release

Delta update - requires 4.2.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 4.3 (build 15T5199f) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-03-07T02:04:19Z. The update package is 324.42 MB. This is a delta (partial) update that requires 4.2.3 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 cd7fa99633476227c389a364630941e4e9a205a7.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-71180-20180306-ECDE7E02-2180-11E8-A5DC-3A70E62A1CD9/com_apple_MobileAsset_SoftwareUpdate/cd7fa99633476227c389a364630941e4e9a205a7.zip