watchOS 4.3

watchOS

Version

4.3

Build ID

15T5209a

File Size

360.64 MB

Release Date

2018-03-12T20:07:39Z

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 15T5209a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-03-12T20:07:39Z. The update package is 360.64 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 b00a0e61dceb24f5214e893079799fda39f9c8e2.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-72949-20180221-7529AE28-23D2-11E8-B10B-CF675B3DAFD9/com_apple_MobileAsset_SoftwareUpdate/b00a0e61dceb24f5214e893079799fda39f9c8e2.zip