watchOS 5.0 (build 16R5360a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-08-24T17:14:27Z. The update package is 278.09 MB. This is a delta (partial) update that requires 5.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b1d0f33f13e06d5668d16c84cebbb85f2967049c.zip.