iPadOS 9.9.11.0 (build 15A6372) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2017-09-12T19:11:07Z. The update package is 1.74 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6f80685b8cdcad3feccee8289282f58d4b9ed9ba.zip.