iPadOS 12.4 (build 16G5027g) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, WiFi), released on 2019-05-15T17:05:21Z. The update package is 209.35 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: f5cc52e7a42e7c3f33c08cfdeb285d1d6379f3f1.zip.