watchOS 4.2

watchOS

Version

4.2

Build ID

15S5100a

File Size

573.37 MB

Release Date

2017-11-13T18:04:11Z

Update Type

Normal release

Delta update - requires 3.2.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 4.2 (build 15S5100a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2017-11-13T18:04:11Z. The update package is 573.37 MB. This is a delta (partial) update that requires 3.2.3 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 0ddc75142856a63d1969025c6c4b32ff3ab1171f.zip.

Direct URL

http://appldnld.apple.com/watchos4.2seed/091-47059-20171113-C2655D3C-C657-11E7-BF31-607D9D2103BC/com_apple_MobileAsset_SoftwareUpdate/0ddc75142856a63d1969025c6c4b32ff3ab1171f.zip