watchOS 6.0 (build 17R5507l) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-06-17T17:12:32Z. The update package is 658.62 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: ff31006c0d60e5e2fd0cf175f22f1bbe6707c6b9.zip.