watchOS 6.0 (build 17R5521e) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-07-02T18:11:02Z. The update package is 712.72 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7803a9d31bec18e2397eba1cdea6e6e1fb67ec30.zip.