watchOS 4.2

watchOS

Version

4.2

Build ID

15S5100a

File Size

151.05 MB

Release Date

2017-11-13T18:04:38Z

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 (38mm) →

About This Update

watchOS 4.2 (build 15S5100a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2017-11-13T18:04:38Z. The update package is 151.05 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 255adb7aefdf9d2f11968aa31a5aa8443f678c91.zip.

Direct URL

http://appldnld.apple.com/watchos4.2seed/091-47079-20171113-0EB0D720-C658-11E7-83CD-518B9D2103BC/com_apple_MobileAsset_SoftwareUpdate/255adb7aefdf9d2f11968aa31a5aa8443f678c91.zip