watchOS 4.3

watchOS

Version

4.3

Build ID

15T5209a

File Size

647.17 MB

Release Date

2018-03-12T20:06:59Z

Update Type

Normal release

Delta update - requires 3.2.3 installed first.

Download OTA

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

About This Update

watchOS 4.3 (build 15T5209a) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2018-03-12T20:06:59Z. The update package is 647.17 MB. This is a delta (partial) update that requires 3.2.3 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 11c91c1477515b1dea5e67791b10d8973aafe648.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-72761-20180221-5FC8FB96-23D3-11E8-8ECE-EE845B3DAFD9/com_apple_MobileAsset_SoftwareUpdate/11c91c1477515b1dea5e67791b10d8973aafe648.zip