watchOS 4.3

watchOS

Version

4.3

Build ID

15T5187e

File Size

371.65 MB

Release Date

2018-02-21T18:12:11Z

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, LTE) →

About This Update

watchOS 4.3 (build 15T5187e) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-02-21T18:12:11Z. The update package is 371.65 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 7a3be07a0b5ada61f6c444c80fd2b90c7af7f55d.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-70312-20180222-2D1D2264-1341-11E8-B369-59B970E8E01E/com_apple_MobileAsset_SoftwareUpdate/7a3be07a0b5ada61f6c444c80fd2b90c7af7f55d.zip