watchOS 4.3

watchOS

Version

4.3

Build ID

15T5187e

File Size

131.88 MB

Release Date

2018-02-21T18:12:01Z

Update Type

Normal release

Delta update - requires 4.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 4.3 (build 15T5187e) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-02-21T18:12:01Z. The update package is 131.88 MB. This is a delta (partial) update that requires 4.3 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 38f4c031836e8139e89b22364b9be0e25156ed22.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-70257-20180222-2D221238-1341-11E8-9C55-72B970E8E01E/com_apple_MobileAsset_SoftwareUpdate/38f4c031836e8139e89b22364b9be0e25156ed22.zip