watchOS 5.1

watchOS

Version

5.1

Build ID

16R5559d

File Size

741.67 MB

Release Date

2018-09-18T17:23:08Z

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 16R5559d) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-09-18T17:23:08Z. The update package is 741.67 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 37796c50cdcb2a230d7cffbf161652cc799dda3b.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/091-96894/EDBB5854-B852-11E8-B06A-8F4E6D2878E5/com_apple_MobileAsset_SoftwareUpdate/37796c50cdcb2a230d7cffbf161652cc799dda3b.zip