watchOS 6.3

watchOS

Version

6.3

Build ID

17U216

File Size

580.32 MB

Release Date

2021-01-26T18:27:03Z

Update Type

Normal release

Delta update - requires 6.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm, LTE) →

About This Update

watchOS 6.3 (build 17U216) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2021-01-26T18:27:03Z. The update package is 580.32 MB. This is a delta (partial) update that requires 6.0 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 fe06e03c692a1b94db94af21f33ab6cfcd291165.zip.

Direct URL

http://updates-http.cdn-apple.com/2021WinterFCS/patches/001-88507/C7A14084-0D15-42A7-8807-5728A76A5679/com_apple_MobileAsset_SoftwareUpdate/fe06e03c692a1b94db94af21f33ab6cfcd291165.zip