watchOS 5.1

watchOS

Version

5.1

Build ID

16R5559d

File Size

727.09 MB

Release Date

2018-09-18T17:22:45Z

Update Type

Normal release

Delta update - requires 4.3.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 5.1 (build 16R5559d) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-09-18T17:22:45Z. The update package is 727.09 MB. This is a delta (partial) update that requires 4.3.1 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 45802be3c938c74ba70d11af45456595da745402.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/091-97051/893CAB52-B853-11E8-A452-AF5E6D2878E5/com_apple_MobileAsset_SoftwareUpdate/45802be3c938c74ba70d11af45456595da745402.zip