watchOS 4.3

watchOS

Version

4.3

Build ID

15T5165e

File Size

313.44 MB

Release Date

2018-01-25T18:04:29Z

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 15T5165e) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-01-25T18:04:29Z. The update package is 313.44 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 421bcf0e8f85d8e254b785de58a959512eb6a111.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-63468-20180123-FD9E93C4-FE2D-11E7-AFE9-F7F05209FAF2/com_apple_MobileAsset_SoftwareUpdate/421bcf0e8f85d8e254b785de58a959512eb6a111.zip