watchOS 5.1

watchOS

Version

5.1

Build ID

16R5584a

File Size

736.88 MB

Release Date

2018-10-15T17:09:26Z

Update Type

Normal release

Delta update - requires 4.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (38mm) →

About This Update

watchOS 5.1 (build 16R5584a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-10-15T17:09:26Z. The update package is 736.88 MB. This is a delta (partial) update that requires 4.3 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 4d25a99f3fe8a6da548851fa191cc9eccf191723.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-13417/FA5B0B3A-CD7F-11E8-B373-91EE0799747A/com_apple_MobileAsset_SoftwareUpdate/4d25a99f3fe8a6da548851fa191cc9eccf191723.zip