watchOS 4.3

watchOS

Version

4.3

Build ID

15T5212a

File Size

325.7 MB

Release Date

2018-03-16T20:09:26Z

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 (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 2018-03-16T20:09:26Z. The update package is 325.7 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 b2b5af086b01d457e1d9bfa9be4058626dd70bf2.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-73378-20180316-F4CD5462-27C0-11E8-B23C-E24AC3BE6990/com_apple_MobileAsset_SoftwareUpdate/b2b5af086b01d457e1d9bfa9be4058626dd70bf2.zip