That highly depends on the target. In case of games, I rarely see them using the native widgets anyway. Otherwise it depends. Right of the box you will at leas

That highly depends on the target. In case of games, I rarely see them using the native widgets anyway. Otherwise it depends. Right of the box you will at least get "good enough" (with Qt for example). If you want to support OSX-only stuff, of course you need some tweaks and platform dependend code.