watchOS 5.3 (build 16U5545c) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2019-06-11T17:13:18Z. The update package is 64.51 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: fe2b6764183ea99d74870a31e34ce217488be4f8.zip.