good practise on handling menues on Mac?

[Tiemo Hollmann TB]

Hello,

Still not being good on Mac I wonder what is a good practice?

When building an app for windows, you create your own app menus. For example
you have the standard "file - quit" menu item

When taking over this app to Mac you still have (more or less) the same
menus. But additionally you get the standard apple menu, where you now have
additionally a quit (Cmd + Q) item to quit your app.

How do you handle this duplicity of menus?

Do you actually show your own menus on Mac, or is there a way to suppress it
on Mac and put all items into the "apple menu bar" ? And if, how?

Thanks for any pointers

Tiemo