iOS 9.9.17.4 (build 21E6219) is an official Apple over-the-air update for the iPhone 13 Pro Max, released on 2024-03-05T18:17:03Z. The update package is 5.8 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: 1e5f977cdeb934ede893ec4c35c5d9963bd0e164.zip.