watchOS 5.1

watchOS

Version

5.1

Build ID

16R591

File Size

176.68 MB

Release Date

2018-10-30T17:21:53Z

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, LTE) →

About This Update

watchOS 5.1 (build 16R591) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2018-10-30T17:21:53Z. The update package is 176.68 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 539677c7ae4729c6950aed80e96942cd32bf0725.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallFCS/patches/041-09586/6C15A9F8-D65C-11E8-837A-C4213A765B55/com_apple_MobileAsset_SoftwareUpdate/539677c7ae4729c6950aed80e96942cd32bf0725.zip