watchOS 5.1

watchOS

Version

5.1

Build ID

16R5577c

File Size

748.16 MB

Release Date

2018-10-09T17:12:12Z

Update Type

Normal release

Delta update - requires 4.3.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (38mm) →

About This Update

watchOS 5.1 (build 16R5577c) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-10-09T17:12:12Z. The update package is 748.16 MB. This is a delta (partial) update that requires 4.3.1 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 1148941249f7033bfe181d95ecafa6f0ddf30d27.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-12257/BE7C2916-C8BE-11E8-97FD-FA826D2878E5/com_apple_MobileAsset_SoftwareUpdate/1148941249f7033bfe181d95ecafa6f0ddf30d27.zip