OSX Statusbar: Styled menu item in Xcode/Qt

what is this type of status bar icon called (the big one with the black background)?

I'm able to create a simple menu bar icons in xcode with no problem but I don't know how the create such a big styled app icon. I don't even know how it is called so that i could search for it...

And is it possible to create such an icon in qt (for a OSX application)?

Thanks, FMK

Solution

These icons are called NSStatusItem. There are a lot deprecated methods on OS X 10.11 (El Capitan) and there is a new way to create those using NSStatusBarButton. You can find more information in this post: How to develop status bar app in OS X Yosemite?