Native Mac "full screen" behavior, which puts an application in its own space, is not supported by MC. As you have observed, maximizing the window makes it take up the entire screen area.
Going into Display View puts MC in its own space, but of course that is Display View and not Standard View. The best you can do in Standard View is to make your own space, move MC to it, and maximize the window.
I like Macs and have used them for well over a decade. But I'm a little confused by the number of people that think full screen in a separate space is a good feature. I understand that it removes the top bar and hides the dock. I understand that this might be cosmetically more "clean looking". But I don't get why it's something that is so sought after. I just maximize MC and use it.
If you feel differently that's completely fine by me. I'm just expressing that I don't get this particular desire from some Mac users.
Brian.
