watchOS 4.3

watchOS

Version

4.3

Build ID

15T5187e

File Size

336.62 MB

Release Date

2018-02-21T18:11:57Z

Update Type

Normal release

Delta update - requires 4.2 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 2018-02-21T18:11:57Z. The update package is 336.62 MB. This is a delta (partial) update that requires 4.2 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 248965380839cc30ad762ed23944c0b5c8b95316.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-70243-20180222-B270E496-1341-11E8-99B2-DBCD70E8E01E/com_apple_MobileAsset_SoftwareUpdate/248965380839cc30ad762ed23944c0b5c8b95316.zip