iPadOS 9.9.17.5.1 (build 21F90) is an official Apple over-the-air update for the iPad Pro (10.5-inch, Cellular), released on 2024-05-20T17:23:14Z. The update package is 4.92 GB. This is a delta (partial) update that requires 11.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f486f638ef698af202b02d9311ee18c8a6798923.zip.