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How to display a view on top of active window/screen?

I’m trying to create a mac app, which will basically play particle effects, or any view with animation when triggered, but it should be able to play full screen on top of any active window/screen.

It’s also a must that the view itself should not be interactive, is that even possible?

Been searching around Stackoverflow/youtube but to no avail. Does anyone have any ideas?

I tried creating a window with NSPanel but couldn’t get it to work. Any help/pointers is appreciated.