watchOS 5.1

watchOS

Version

5.1

Build ID

16R5577c

File Size

748.03 MB

Release Date

2018-10-09T17:12:13Z

Update Type

Normal release

Delta update - requires 4.3.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (38mm) →

About This Update

watchOS 5.1 (build 16R5577c) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-10-09T17:12:13Z. The update package is 748.03 MB. This is a delta (partial) update that requires 4.3.2 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 2a91d0fe2717f4806e6ae7ea5113d93c13f2b1ae.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-12239/9B8AA392-C8BE-11E8-BEE6-0D806D2878E5/com_apple_MobileAsset_SoftwareUpdate/2a91d0fe2717f4806e6ae7ea5113d93c13f2b1ae.zip