watchOS 4.0

watchOS

Version

4.0

Build ID

15R372

File Size

599.13 MB

Release Date

2017-09-12T19:05:02Z

Update Type

Normal release

Delta update - requires 3.1.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 2 (42mm) →

About This Update

watchOS 4.0 (build 15R372) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2017-09-12T19:05:02Z. The update package is 599.13 MB. This is a delta (partial) update that requires 3.1.1 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 9866cacb562d644f9313348c76a0250eb7602737.zip.

Direct URL

http://appldnld.apple.com/watchos4.0/031-94389-201700919-7FF2C21A-8E8E-11E7-A011-33B8B54D2808/com_apple_MobileAsset_SoftwareUpdate/9866cacb562d644f9313348c76a0250eb7602737.zip