iPadOS 9.9.16.4 (build 20E246) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2023-03-27T17:12:01Z. The update package is 3.97 GB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e14bb35f262f8c14ab1b02235e5f87395ec17f5c.zip.