watchOS 4.3

watchOS

Version

4.3

Build ID

15T5176c

File Size

355.14 MB

Release Date

2018-02-07T18:09:49Z

Update Type

Normal release

Delta update - requires 4.0 installed first.

Download OTA

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

About This Update

watchOS 4.3 (build 15T5176c) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-02-07T18:09:49Z. The update package is 355.14 MB. This is a delta (partial) update that requires 4.0 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 5e1e42b9e444e8d5ebbceb1a8825e489ca5cd142.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-64208-20180205-79715134-07A3-11E8-8DE3-FF57315CC82B/com_apple_MobileAsset_SoftwareUpdate/5e1e42b9e444e8d5ebbceb1a8825e489ca5cd142.zip