watchOS 4.2

watchOS

Version

4.2

Build ID

15S5100a

File Size

221.66 MB

Release Date

2017-11-13T18:02:55Z

Update Type

Normal release

Delta update - requires 4.0 installed first.

Download OTA

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

About This Update

watchOS 4.2 (build 15S5100a) is an official Apple over-the-air update for the Apple Watch (38mm), released on 2017-11-13T18:02:55Z. The update package is 221.66 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 f3d4a10d404f2f097630b6b013fa3523231c17d6.zip.

Direct URL

http://appldnld.apple.com/watchos4.2seed/091-47095-20171113-DDC3DC16-C657-11E7-B5D5-8C829D2103BC/com_apple_MobileAsset_SoftwareUpdate/f3d4a10d404f2f097630b6b013fa3523231c17d6.zip