Index: /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineWindow.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineWindow.cpp	(revision 66647)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineWindow.cpp	(revision 66648)
@@ -346,8 +346,10 @@
                                                                   console().GetGuestEnteredACPIMode(),
                                                                   restrictedCloseActions);
+#ifndef VBOX_WS_MAC
         /* Configure close-dialog: */
         const QIcon *pMachineWindowIcon = uisession()->machineWindowIcon();
         if (pMachineWindowIcon)
             pCloseDlg->setPixmap(pMachineWindowIcon->pixmap(QSize(32, 32)));
+#endif /* !VBOX_WS_MAC */
 
         /* Make sure close-dialog is valid: */