watchOS 6.0 (build 17R575) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-09-11T18:36:12Z. The update package is 802.49 MB. This is a delta (partial) update that requires 5.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5bc23d36a01b6ceb996075296a34766da1ae547e.zip.