watchOS 6.0 (build 17R5532f) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-07-17T17:43:27Z. The update package is 667.45 MB. This is a delta (partial) update that requires 5.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e405b368800efb12efd96ed345e5410aeb9f49ea.zip.