iOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPhone XS Max, released on 2019-07-16T17:39:34Z. The update package is 135.29 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bccc202e90771d133e27e2daf292f4a067448757.zip.