watchOS 5.1

watchOS

Version

5.1

Build ID

16R5577c

File Size

106.19 MB

Release Date

2018-10-09T17:12:26Z

Update Type

Normal release

Delta update - requires 5.1 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 2018-10-09T17:12:26Z. The update package is 106.19 MB. This is a delta (partial) update that requires 5.1 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 36d189db5832a27d3641f4cdfdb8eef8bc1b832c.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-12134/963305CA-C8BD-11E8-A3D4-B65D6D2878E5/com_apple_MobileAsset_SoftwareUpdate/36d189db5832a27d3641f4cdfdb8eef8bc1b832c.zip