watchOS 4.0

watchOS

Version

4.0

Build ID

15R372

File Size

524.08 MB

Release Date

2017-09-12T19:04:48Z

Update Type

Normal release

Delta update - requires 3.2.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch (38mm) →

About This Update

watchOS 4.0 (build 15R372) is an official Apple over-the-air update for the Apple Watch (38mm), released on 2017-09-12T19:04:48Z. The update package is 524.08 MB. This is a delta (partial) update that requires 3.2.2 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 2b13fed71295a88515c57723c052159e0052bc84.zip.

Direct URL

http://appldnld.apple.com/watchos4.0/091-14644-201700919-C77EB580-8E8E-11E7-9ED7-B4BDB54D2808/com_apple_MobileAsset_SoftwareUpdate/2b13fed71295a88515c57723c052159e0052bc84.zip