iPadOS 12.4 (build 16G5056d) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, WiFi, 1TB Model), released on 2019-06-24T17:17:17Z. The update package is 217.85 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: f11ce11553d6d56f0ee7fb038ff415d0fbac9b69.zip.