watchOS 5.1

watchOS

Version

5.1

Build ID

16R5577c

File Size

177.3 MB

Release Date

2018-10-09T17:12:30Z

Update Type

Normal release

Delta update - requires 5.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (44mm, LTE) →

About This Update

watchOS 5.1 (build 16R5577c) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2018-10-09T17:12:30Z. The update package is 177.3 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 287946be4414f87f853bd4175c1b104a8b81802d.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-12124/E0790878-C8BD-11E8-8D69-D3666D2878E5/com_apple_MobileAsset_SoftwareUpdate/287946be4414f87f853bd4175c1b104a8b81802d.zip