iPadOS 12.4 (build 16G5056d) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, WiFi), released on 2019-06-24T17:17:15Z. The update package is 336.66 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c21295f8bf2287eaf3bc11c4d7ac126f08f5d90e.zip.