iPadOS 12.4 (build 16G5046d) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2019-06-11T17:07:05Z. The update package is 225.38 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: 93bf50e45ad58581eb85e1177cbc6898c925108f.zip.