DropArea works incorrectly with file drops on Mac

import QtQuick 2.0

Rectangle {
    id: background;
    color: "white";
    width: 300;
    height: 300;

    DropArea {
        anchors.fill: parent;
        onEntered: {
            background.color = "gray";
            if (!drag.accepted)
                drag.accept (Qt.CopyAction);
            console.log("onEntered");
        }
        onDropped: {
            console.log ("onDropped");
        }
        onExited: {
            background.color = "white";
            console.log ("onExited");
        }
    }
}