watchOS 5.1

watchOS

Version

5.1

Build ID

16R591

File Size

771.29 MB

Release Date

2018-10-30T17:21:03Z

Update Type

Normal release

Delta update - requires 4.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (38mm) →

About This Update

watchOS 5.1 (build 16R591) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-10-30T17:21:03Z. The update package is 771.29 MB. This is a delta (partial) update that requires 4.0 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 d6b72a7dd5704bb476e3386e4c24e6be2dc5af37.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallFCS/patches/091-90123/43938AC6-D65D-11E8-82DD-A96A2F022A69/com_apple_MobileAsset_SoftwareUpdate/d6b72a7dd5704bb476e3386e4c24e6be2dc5af37.zip