watchOS 5.1

watchOS

Version

5.1

Build ID

16R5559d

File Size

776.64 MB

Release Date

2018-09-18T17:22:59Z

Update Type

Normal release

Delta update - requires 4.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (42mm, LTE) →

About This Update

watchOS 5.1 (build 16R5559d) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-09-18T17:22:59Z. The update package is 776.64 MB. This is a delta (partial) update that requires 4.3 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 66d07bf0cda1913e775e6d776c6a3cead4e1072b.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/091-96919/8D5D563C-B853-11E8-B0F3-255F6D2878E5/com_apple_MobileAsset_SoftwareUpdate/66d07bf0cda1913e775e6d776c6a3cead4e1072b.zip