watchOS 4.2

watchOS

Version

4.2

Build ID

15S102

File Size

540.97 MB

Release Date

2017-12-05T18:00:37Z

Update Type

Normal release

Delta update - requires 3.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch (38mm) →

About This Update

watchOS 4.2 (build 15S102) is an official Apple over-the-air update for the Apple Watch (38mm), released on 2017-12-05T18:00:37Z. The update package is 540.97 MB. This is a delta (partial) update that requires 3.2 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 a05b9acd5194abe327829dacb39555d9688e04d4.zip.

Direct URL

http://appldnld.apple.com/watchos4.2/091-19358-20171204-2DB58B58-D480-11E7-95F0-A8242EDC3D3E/com_apple_MobileAsset_SoftwareUpdate/a05b9acd5194abe327829dacb39555d9688e04d4.zip