watchOS 6.0 (build 17R5575a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-08-27T17:31:35Z. The update package is 122.55 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 20feef39933c313ad459b4d45c636d5f19a5cdc4.zip.