watchOS 5.1

watchOS

Version

5.1

Build ID

16R5577c

File Size

159.57 MB

Release Date

2018-10-09T17:12:25Z

Update Type

Normal release

Delta update - requires 5.0.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm) →

About This Update

watchOS 5.1 (build 16R5577c) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2018-10-09T17:12:25Z. The update package is 159.57 MB. This is a delta (partial) update that requires 5.0.1 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 520b9fc3160f42892f9f03078690e3b85dcc6ee6.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-12161/963C8154-C8BD-11E8-890D-C55D6D2878E5/com_apple_MobileAsset_SoftwareUpdate/520b9fc3160f42892f9f03078690e3b85dcc6ee6.zip