watchOS 4.0

watchOS

Version

4.0

Build ID

15R5371a

File Size

235.28 MB

Release Date

2017-08-28T16:53:14Z

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 15R5371a) is an official Apple over-the-air update for the Apple Watch (38mm), released on 2017-08-28T16:53:14Z. The update package is 235.28 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 aa410767e89ab16ec954e0609907905ac09c363a.zip.

Direct URL

http://appldnld.apple.com/watchos4.0seeds/091-30864-20170828-48A551C8-8A7F-11E7-AEB3-B87BAB25A5A9/com_apple_MobileAsset_SoftwareUpdate/aa410767e89ab16ec954e0609907905ac09c363a.zip