iOS 13.4.5 (build 17F5044d) is an official Apple over-the-air update for the iPhone 11 Pro Max, released on 2020-04-15T17:15:47Z. The update package is 382.93 MB. This is a delta (partial) update that requires 13.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 75a6277ecf333a4a9a038e75521665e67b4c50f0.zip.