watchOS 4.2

watchOS

Version

4.2

Build ID

15S5100a

File Size

51.57 MB

Release Date

2017-11-13T18:03:18Z

Update Type

Normal release

Delta update - requires 4.2 installed first.

Download OTA

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

About This Update

watchOS 4.2 (build 15S5100a) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2017-11-13T18:03:18Z. The update package is 51.57 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 09785a361d4d719f4c3c648a061bc78df0674a7f.zip.

Direct URL

http://appldnld.apple.com/watchos4.2seed/091-47047-20171113-24A42EF6-C658-11E7-9A0A-D0919D2103BC/com_apple_MobileAsset_SoftwareUpdate/09785a361d4d719f4c3c648a061bc78df0674a7f.zip