watchOS 6.3

watchOS

Version

6.3

Build ID

17U216

File Size

143.16 MB

Release Date

2021-01-26T18:26:36Z

Update Type

Normal release

Delta update - requires 6.2.5 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (38mm) →

About This Update

watchOS 6.3 (build 17U216) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2021-01-26T18:26:36Z. The update package is 143.16 MB. This is a delta (partial) update that requires 6.2.5 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 94a285caf2f72d39896fe68966e115545c61785d.zip.

Direct URL

http://updates-http.cdn-apple.com/2021WinterFCS/patches/001-88879/82678B01-33D2-4E87-BD2F-622F0DB1494E/com_apple_MobileAsset_SoftwareUpdate/94a285caf2f72d39896fe68966e115545c61785d.zip