watchOS 4.3

watchOS

Version

4.3

Build ID

15T5199f

File Size

384.11 MB

Release Date

2018-03-06T18:08:22Z

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 (38mm, LTE) →

About This Update

watchOS 4.3 (build 15T5199f) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-03-06T18:08:22Z. The update package is 384.11 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 330cf2ac51b5513471bfc5b890b0db2a24dc30b2.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-71073-20180306-B900C520-1E53-11E8-BB9D-E62B564229C9/com_apple_MobileAsset_SoftwareUpdate/330cf2ac51b5513471bfc5b890b0db2a24dc30b2.zip