watchOS 4.0

watchOS

Version

4.0

Build ID

15R5371a

File Size

41.77 MB

Release Date

2017-08-28T16:53:20Z

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 15R5371a) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2017-08-28T16:53:20Z. The update package is 41.77 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 6ac3b1794e054b0765eece595e36b57a41cdd4f6.zip.

Direct URL

http://appldnld.apple.com/watchos4.0seeds/091-30869-20170828-76327BFC-8A7F-11E7-B38A-3581AB25A5A9/com_apple_MobileAsset_SoftwareUpdate/6ac3b1794e054b0765eece595e36b57a41cdd4f6.zip