Where can you find the control panel for xampp in mac?

Yeah, thanks @Jon's answer helped me out in the end, indirectly. They should make a cross platform with Electron, it's 2018 already! :).

But you can pick the Manage Servers tab and have similar functionality on MAC:

I find it most annoying that the Xampp manager doesn't have XAMPP in the name, but is vaguely called 'manager-osx'. This way you can't quickly find it through OS X's Spotlight search. The names comes across as a bit of egocentric of the developers thinking they've made only manager application. But yeah; it's freeware...

I looked up the question on the apache forum for mac and it appears there the interface you're looking for is only available on Windows.