watchOS 4.0

watchOS

Version

4.0

Build ID

15R5372

File Size

75.43 MB

Release Date

2017-09-12T19:05:13Z

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 2017-09-12T19:05:13Z. The update package is 75.43 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 2ba18af2f82566ecd33e0bbd9585481940d42bde.zip.

Direct URL

http://appldnld.apple.com/watchos4.0/091-28500-201700919-7D3878CA-8E8F-11E7-9718-3CCBB54D2808/com_apple_MobileAsset_SoftwareUpdate/2ba18af2f82566ecd33e0bbd9585481940d42bde.zip