iOS 9.9.17.1.1 (build 21B91) is an official Apple over-the-air update for the iPhone 13 Pro Max, released on 2023-11-07T21:29:39Z. The update package is 5.83 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: 11f3c8f09d836a7b52f56f73a94e597d0ecaec55.zip.