watchOS 4.0

watchOS

Version

4.0

Build ID

15R5371a

File Size

80.86 MB

Release Date

2017-08-28T16:53:15Z

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 2017-08-28T16:53:15Z. The update package is 80.86 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 60fe15239cba37dafd7703f0b6afaad3df834f52.zip.

Direct URL

http://appldnld.apple.com/watchos4.0seeds/091-30780-20170828-696F2DFC-8A7F-11E7-83BC-1C7FAB25A5A9/com_apple_MobileAsset_SoftwareUpdate/60fe15239cba37dafd7703f0b6afaad3df834f52.zip