watchOS 4.2

watchOS

Version

4.2

Build ID

15S5100a

File Size

187.1 MB

Release Date

2017-11-13T18:04:45Z

Update Type

Normal release

Delta update - requires 4.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (42mm) →

About This Update

watchOS 4.2 (build 15S5100a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2017-11-13T18:04:45Z. The update package is 187.1 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 6096e3880820a7924f1d5bac3de8f15a9a9c3186.zip.

Direct URL

http://appldnld.apple.com/watchos4.2seed/091-47124-20171113-105A7E6E-C658-11E7-ABB3-298C9D2103BC/com_apple_MobileAsset_SoftwareUpdate/6096e3880820a7924f1d5bac3de8f15a9a9c3186.zip