iOS 12.4 (build 16G5069a) is an official Apple over-the-air update for the iPhone XS Max, released on 2019-07-09T17:16:21Z. The update package is 134.56 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: 36e34948f3d50f413f01d65725225f6dd0d62f7b.zip.