iPadOS 12.4 (build 16G5056d) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2019-06-24T17:16:56Z. The update package is 284.04 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: 51dba16894cd5bbf1f8b0fc1e438d277b0c6cf12.zip.