watchOS 4.0

watchOS

Version

4.0

Build ID

15R5372

File Size

200.18 MB

Release Date

2017-09-12T19:05:12Z

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 4.0 (build 15R5372) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2017-09-12T19:05:12Z. The update package is 200.18 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 16220b13e142060db465982c1471cef466d7924a.zip.

Direct URL

http://appldnld.apple.com/watchos4.0/091-25961-201700919-4932F154-8E8F-11E7-83FF-A7C5B54D2808/com_apple_MobileAsset_SoftwareUpdate/16220b13e142060db465982c1471cef466d7924a.zip