watchOS 4.3

watchOS

Version

4.3

Build ID

15T5212a

File Size

362.09 MB

Release Date

2018-03-16T20:09:24Z

Update Type

Normal release

Delta update - requires 4.0 installed first.

Download OTA

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

About This Update

watchOS 4.3 (build 15T5212a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-03-16T20:09:24Z. The update package is 362.09 MB. This is a delta (partial) update that requires 4.0 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 1dc0672cfb6327ecdbdd09dc6f8f6beea571339e.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-73492-20180316-A3F62112-27C1-11E8-A175-E161C3BE6990/com_apple_MobileAsset_SoftwareUpdate/1dc0672cfb6327ecdbdd09dc6f8f6beea571339e.zip