watchOS 4.3

watchOS

Version

4.3

Build ID

15T5212a

File Size

374.78 MB

Release Date

2018-03-16T20:09:37Z

Update Type

Normal release

Delta update - requires 4.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (42mm, LTE) →

About This Update

watchOS 4.3 (build 15T5212a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-03-16T20:09:37Z. The update package is 374.78 MB. This is a delta (partial) update that requires 4.1 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 fc1c256029b6cb41ed119f62cae3bd6bb5b4efed.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-73508-20180316-B20212E8-27C1-11E8-BA4C-F263C3BE6990/com_apple_MobileAsset_SoftwareUpdate/fc1c256029b6cb41ed119f62cae3bd6bb5b4efed.zip