watchOS 6.0 (build 17R5521e) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-07-02T18:10:17Z. The update package is 728.49 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: ecc15c22869b72513e49ca7f8fd1a96fc1df8c32.zip.