watchOS 4.2

watchOS

Version

4.2

Build ID

15S5100a

File Size

543.88 MB

Release Date

2017-11-13T18:02:51Z

Update Type

Normal release

Delta update - requires 3.2.3 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 2017-11-13T18:02:51Z. The update package is 543.88 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 1b29bed30d222754373e6429314047335e9fda23.zip.

Direct URL

http://appldnld.apple.com/watchos4.2seed/091-47068-20171113-C2671C76-C657-11E7-8621-627D9D2103BC/com_apple_MobileAsset_SoftwareUpdate/1b29bed30d222754373e6429314047335e9fda23.zip