gistfile1

diff --git a/src/widgets/styles/qmacstyle_mac.mm b/src/widgets/styles/qmacstyle_mac.mm
index 3cfe5cb..65a05c0 100644
--- a/src/widgets/styles/qmacstyle_mac.mm
+++ b/src/widgets/styles/qmacstyle_mac.mm
@@ -2830,6 +2830,12 @@ int QMacStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWidget *w
     case SH_DockWidget_ButtonsHaveFrame:
         ret = false;
         break;
+    case SH_ScrollBar_Transient:
+        ret = QSysInfo::MacintoshVersion >= QSysInfo::MV_10_7;
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
+        ret &= [NSScroller preferredScrollerStyle] == NSScrollerStyleOverlay;
+#endif
+        break;
     default:
         ret = QCommonStyle::styleHint(sh, opt, w, hret);
         break;