watchOS 5.1

watchOS

Version

5.1

Build ID

16R5559d

File Size

494.33 MB

Release Date

2018-09-18T17:22:48Z

Update Type

Normal release

Delta update - requires 5.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 5.1 (build 16R5559d) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-09-18T17:22:48Z. The update package is 494.33 MB. This is a delta (partial) update that requires 5.0 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 d2d4e87a41eaab4b0646c3f8392af8a433112535.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/091-97048/EB19C892-B852-11E8-86A5-094E6D2878E5/com_apple_MobileAsset_SoftwareUpdate/d2d4e87a41eaab4b0646c3f8392af8a433112535.zip