watchOS 4.0

watchOS

Version

4.0

Build ID

15R5365a

File Size

513.55 MB

Release Date

2017-08-22T16:58:27Z

Update Type

Normal release

Delta update - requires 3.2.3 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 2017-08-22T16:58:27Z. The update package is 513.55 MB. This is a delta (partial) update that requires 3.2.3 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 59234f96291bd8e6a9d5b81929ca99b24d5a9fe5.zip.

Direct URL

http://appldnld.apple.com/watchos4.0seeds/091-29992-20170821-9CDD09D0-84F7-11E7-8F15-E3A3AA25A5A9/com_apple_MobileAsset_SoftwareUpdate/59234f96291bd8e6a9d5b81929ca99b24d5a9fe5.zip