How to produce a DMG / Mac Executable on a PC?

We’re in the final stages of releasing a game, and we’ve been making a game on a PC Unreal 4.23.
What’s the best way of making a Mac executable (a .dmg) ? Most of our audience 80% - 90% are on Mac OS.
We have a reasonably quick PC and IMac to work with, so we can change files between computers.

Ideally we’d make it all on the PC, but can’t see an easy or elegant solution.

If anyone has a solution please let us know!

Just done this works perfectly.
Thank you.

I’m pretty sure you have to make Mac files on a Mac. You have to migrate your project to the mac and make it from there…