watchOS 6.3

watchOS

Version

6.3

Build ID

17U216

File Size

126.87 MB

Release Date

2021-01-26T18:26:59Z

Update Type

Normal release

Delta update - requires 6.2.6 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 126.87 MB. This is a delta (partial) update that requires 6.2.6 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 4337327a53042b2e36c4732fc243426c0692da40.zip.

Direct URL

http://updates-http.cdn-apple.com/2021WinterFCS/patches/001-88725/EB2ED9D8-834A-4A5B-8B3D-DBAEB5EB10BB/com_apple_MobileAsset_SoftwareUpdate/4337327a53042b2e36c4732fc243426c0692da40.zip