Index: /trunk/src/VBox/Frontends/VirtualBox/src/selector/UISelectorWindow.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/selector/UISelectorWindow.cpp	(revision 64767)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/selector/UISelectorWindow.cpp	(revision 64768)
@@ -68,4 +68,5 @@
 # include "UIExtraDataManager.h"
 # include "UIDesktopWidgetWatchdog.h"
+# include "UIModalWindowManager.h"
 # include "VBoxGlobal.h"
 # ifdef VBOX_WS_MAC
@@ -429,5 +430,9 @@
     QString strTmpFile = strFileName;
 #endif /* !VBOX_WS_MAC */
-    UISafePointerWizardImportApp pWizard = new UIWizardImportApp(this, strTmpFile);
+
+    /* Use the "safe way" to open stack of Mac OS X Sheets: */
+    QWidget *pWizardParent = windowManager().realParentWindow(this);
+    UISafePointerWizardImportApp pWizard = new UIWizardImportApp(pWizardParent, strTmpFile);
+    windowManager().registerNewParent(pWizard, pWizardParent);
     pWizard->prepare();
     if (strFileName.isEmpty() || pWizard->isValid())