watchOS 6.3

watchOS

Version

6.3

Build ID

17U216

File Size

69.85 MB

Release Date

2021-01-26T18:26:59Z

Update Type

Normal release

Delta update - requires 6.2.8 installed first.

Download OTA

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

About This Update

watchOS 6.3 (build 17U216) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2021-01-26T18:26:59Z. The update package is 69.85 MB. This is a delta (partial) update that requires 6.2.8 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 a21b2147bb0888befb3ce5c7c1c331021c30ed1f.zip.

Direct URL

http://updates-http.cdn-apple.com/2021WinterFCS/patches/001-95824/61FB6C3F-041D-4633-81AA-595F1127D488/com_apple_MobileAsset_SoftwareUpdate/a21b2147bb0888befb3ce5c7c1c331021c30ed1f.zip