watchOS 6.3

watchOS

Version

6.3

Build ID

17U216

File Size

445.29 MB

Release Date

2021-01-26T18:27:12Z

Update Type

Normal release

Delta update - requires 6.1.3 installed first.

Download OTA

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

About This Update

watchOS 6.3 (build 17U216) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2021-01-26T18:27:12Z. The update package is 445.29 MB. This is a delta (partial) update that requires 6.1.3 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 ced1c3372336237a16de9d2a3667c639bb6fcd41.zip.

Direct URL

http://updates-http.cdn-apple.com/2021WinterFCS/patches/001-88673/792F6E71-A857-4E9D-AF2A-FA60E46437BE/com_apple_MobileAsset_SoftwareUpdate/ced1c3372336237a16de9d2a3667c639bb6fcd41.zip