watchOS 4.2

watchOS

Version

4.2

Build ID

15S5100a

File Size

152.13 MB

Release Date

2017-11-13T18:04:44Z

Update Type

Normal release

Delta update - requires 4.1 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 2017-11-13T18:04:44Z. The update package is 152.13 MB. This is a delta (partial) update that requires 4.1 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 8ac7285b51644206dbef2e12be5b5d79c0d2daa3.zip.

Direct URL

http://appldnld.apple.com/watchos4.2seed/091-46991-20171113-026FEF96-C658-11E7-8B76-F1889D2103BC/com_apple_MobileAsset_SoftwareUpdate/8ac7285b51644206dbef2e12be5b5d79c0d2daa3.zip