watchOS 4.2

watchOS

Version

4.2

Build ID

15S5102b

File Size

150.75 MB

Release Date

2017-11-17T18:18:04Z

Update Type

Normal release

Delta update - requires 4.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (42mm) →

About This Update

watchOS 4.2 (build 15S5102b) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2017-11-17T18:18:04Z. The update package is 150.75 MB. This is a delta (partial) update that requires 4.1 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 16a73041504e329f9d3bec19b96516b7f361dd08.zip.

Direct URL

http://appldnld.apple.com/watchos4.2seed/091-47404-20171117-0FB7025C-CA3B-11E7-A7D7-8BA1674CD23E/com_apple_MobileAsset_SoftwareUpdate/16a73041504e329f9d3bec19b96516b7f361dd08.zip