watchOS 5.1

watchOS

Version

5.1

Build ID

16R5559d

File Size

727.07 MB

Release Date

2018-09-18T17:22:25Z

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 2 (38mm) →

About This Update

watchOS 5.1 (build 16R5559d) is an official Apple over-the-air update for the Apple Watch Series 2 (38mm), released on 2018-09-18T17:22:25Z. The update package is 727.07 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 57f1d23b5f82a274fc658ce96815d54b12b9c3cf.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/091-97036/8ADE0B22-B853-11E8-A1EA-D05E6D2878E5/com_apple_MobileAsset_SoftwareUpdate/57f1d23b5f82a274fc658ce96815d54b12b9c3cf.zip