diff --git a/5.6.0/qtbase/src/plugins/platforms/cocoa/qcocoawindow.mm b/5.6.0/qtbase/src/plugins/platforms/cocoa/qcocoawindow.mm
index 00cb43c..6e6020f 100644
--- a/5.6.0/qtbase/src/plugins/platforms/cocoa/qcocoawindow.mm
+++ b/5.6.0/qtbase/src/plugins/platforms/cocoa/qcocoawindow.mm
@@ -1638,8 +1638,12 @@ void QCocoaWindow::setWindowCursor(NSCursor *cursor)
     // Othervise, set the cursor if this window is under the mouse. In
     // this case QNSView::cursorUpdate will set the cursor as the pointer
     // moves.
-    if (m_nsWindow && m_qtView) {
-        [m_nsWindow invalidateCursorRectsForView : m_qtView];
+    NSWindow *nsWindow = m_nsWindow;
+    if (!nsWindow)
+        nsWindow = [m_qtView nsWindow];
+
+    if (nsWindow && m_qtView) {
+        [nsWindow invalidateCursorRectsForView : m_qtView];
     } else {
         if (m_windowUnderMouse)
             [cursor set];
diff --git a/5.6.0/qtbase/src/plugins/platforms/cocoa/qnsview.h b/5.6.0/qtbase/src/plugins/platforms/cocoa/qnsview.h
index 50b456c..1b09e11 100644
--- a/5.6.0/qtbase/src/plugins/platforms/cocoa/qnsview.h
+++ b/5.6.0/qtbase/src/plugins/platforms/cocoa/qnsview.h
@@ -140,6 +140,8 @@ Q_FORWARD_DECLARE_OBJC_CLASS(QT_MANGLE_NAMESPACE(QNSViewMouseMoveHelper));
 - (void)registerDragTypes;
 - (NSDragOperation)handleDrag:(id <NSDraggingInfo>)sender;
 
+- (NSWindow *)nsWindow;
+
 @end
 
 QT_NAMESPACE_ALIAS_OBJC_CLASS(QNSView);
diff --git a/5.6.0/qtbase/src/plugins/platforms/cocoa/qnsview.mm b/5.6.0/qtbase/src/plugins/platforms/cocoa/qnsview.mm
index 4e005bb..064eeba 100644
--- a/5.6.0/qtbase/src/plugins/platforms/cocoa/qnsview.mm
+++ b/5.6.0/qtbase/src/plugins/platforms/cocoa/qnsview.mm
@@ -921,7 +921,7 @@ QT_WARNING_POP
 {
     Q_UNUSED(theEvent)
     // Set the cursor manually if there is no NSWindow.
-    if (!m_platformWindow->m_nsWindow && m_platformWindow->m_windowCursor)
+    if (![self nsWindow] && m_platformWindow->m_windowCursor)
         [m_platformWindow->m_windowCursor set];
     else
         [super cursorUpdate:theEvent];
@@ -930,7 +930,7 @@ QT_WARNING_POP
 -(void)resetCursorRects
 {
     // Use the cursor rect API if there is a NSWindow
-    if (m_platformWindow->m_nsWindow && m_platformWindow->m_windowCursor)
+    if ([self nsWindow] && m_platformWindow->m_windowCursor)
         [self addCursorRect:[self visibleRect] cursor:m_platformWindow->m_windowCursor];
 }
 
@@ -2054,4 +2054,24 @@ static QPoint mapWindowCoordinates(QWindow *source, QWindow *target, QPoint poin
     QWindowSystemInterface::handleMouseEvent(target, mapWindowCoordinates(m_window, target, qtWindowPoint), qtScreenPoint, m_buttons);
 }
 
+- (NSWindow *)nsWindow
+{
+    typedef QT_MANGLE_NAMESPACE(QNSView) QNSV;
+
+    NSWindow *win = m_platformWindow->m_nsWindow;
+    NSView *parent = self.superview;
+    while (!win) {
+        if (![parent isKindOfClass:[QNSV class]])
+            break;
+
+        QCocoaWindow *platformWindow = static_cast<QNSV *>(parent)->m_platformWindow;
+        if (platformWindow)
+            win = platformWindow->m_nsWindow;
+
+        parent = parent.superview;
+    }
+
+    return win;
+}
+
 @end