watchOS 4.0

watchOS

Version

4.0

Build ID

15R5365a

File Size

80.37 MB

Release Date

2017-08-22T16:58:28Z

Update Type

Normal release

Delta update - requires 4.0 installed first.

Download OTA

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

About This Update

watchOS 4.0 (build 15R5365a) is an official Apple over-the-air update for the Apple Watch (38mm), released on 2017-08-22T16:58:28Z. The update package is 80.37 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 c63dc32242bc65b897589c8c390f7b6a2187fe4d.zip.

Direct URL

http://appldnld.apple.com/watchos4.0seeds/091-29979-20170821-767E5F8C-84F7-11E7-ACB5-CF9FAA25A5A9/com_apple_MobileAsset_SoftwareUpdate/c63dc32242bc65b897589c8c390f7b6a2187fe4d.zip