iPadOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, WiFi, 1TB Model), released on 2019-07-16T17:39:25Z. The update package is 128.03 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f70c58f7034d99d15226769bc5d57ad124ed0eee.zip.