watchOS 5.1

watchOS

Version

5.1

Build ID

16R591

File Size

159.14 MB

Release Date

2018-10-30T17:21:49Z

Update Type

Normal release

Delta update - requires 5.0.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm) →

About This Update

watchOS 5.1 (build 16R591) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2018-10-30T17:21:49Z. The update package is 159.14 MB. This is a delta (partial) update that requires 5.0.1 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 781ca5549c63b3bd6a604141206e771de078cc38.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallFCS/patches/041-09588/6F24F81A-D65C-11E8-A4AE-AC91AFFC7804/com_apple_MobileAsset_SoftwareUpdate/781ca5549c63b3bd6a604141206e771de078cc38.zip