watchOS 4.0

watchOS

Version

4.0

Build ID

15R5371a

File Size

527.73 MB

Release Date

2017-08-28T16:53:18Z

Update Type

Normal release

Delta update - requires 3.2.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch (42mm) →

About This Update

watchOS 4.0 (build 15R5371a) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2017-08-28T16:53:18Z. The update package is 527.73 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 444c03ee25991a99d4cee23c27ebd96703846ed9.zip.

Direct URL

http://appldnld.apple.com/watchos4.0seeds/091-30844-20170828-F52D3E0C-8A7E-11E7-8DC9-7C74AB25A5A9/com_apple_MobileAsset_SoftwareUpdate/444c03ee25991a99d4cee23c27ebd96703846ed9.zip