"more or less", on Mac it will sometimes use dummy OS controls for the sake of rendering, e.g. like here : https://code.woboq.org/qt5/qtbase/src/plugins/styles

"more or less", on Mac it will sometimes use dummy OS controls for the sake of rendering, e.g. like here : https://code.woboq.org/qt5/qtbase/src/plugins/styles/mac/qmacstyle_mac.mm.html#3625 https://code.woboq.org/qt5/qtbase/src/plugins/styles/mac/qma... But it cannot just use native controls all the time as it generally supports more features than what is available on a given platform, so there has to be a kind of emulation.