watchOS 5.0 (build 16R5334f) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-07-30T17:09:48Z. The update package is 656.31 MB. This is a delta (partial) update that requires 4.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d7fcdfb557fc76bf027163a3ad9430a0637d9d6d.zip.