watchOS 5.1

watchOS

Version

5.1

Build ID

16R5577c

File Size

177.24 MB

Release Date

2018-10-09T17:12:28Z

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, LTE) →

About This Update

watchOS 5.1 (build 16R5577c) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2018-10-09T17:12:28Z. The update package is 177.24 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 939b7ad97225ad7efbef0e8946e000872fa65665.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-12227/9633014C-C8BD-11E8-A22D-C75D6D2878E5/com_apple_MobileAsset_SoftwareUpdate/939b7ad97225ad7efbef0e8946e000872fa65665.zip