watchOS 4.3

watchOS

Version

4.3

Build ID

15T5212a

File Size

331.42 MB

Release Date

2018-03-16T20:09:47Z

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 3 (38mm) →

About This Update

watchOS 4.3 (build 15T5212a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-03-16T20:09:47Z. The update package is 331.42 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 c8afaa138abd6541b92ff5b94e7f1ec4fec89d7e.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-73552-20180316-03A671DE-27C2-11E8-968E-F36CC3BE6990/com_apple_MobileAsset_SoftwareUpdate/c8afaa138abd6541b92ff5b94e7f1ec4fec89d7e.zip