iOS 12.4 (build 16G5046d) is an official Apple over-the-air update for the iPhone XS Max, released on 2019-06-11T17:07:37Z. The update package is 337.12 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8792c6b7fc7eb01565769b8b4e5a73fcb70f865e.zip.