watchOS 4.2

watchOS

Version

4.2

Build ID

15S5100a

File Size

175.8 MB

Release Date

2017-11-13T18:03:15Z

Update Type

Normal release

Delta update - requires 4.0 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 2017-11-13T18:03:15Z. The update package is 175.8 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 c75886678908bb035668b9d65b990566e6b9639f.zip.

Direct URL

http://appldnld.apple.com/watchos4.2seed/091-47018-20171113-F4B82378-C657-11E7-A95D-3F869D2103BC/com_apple_MobileAsset_SoftwareUpdate/c75886678908bb035668b9d65b990566e6b9639f.zip