2 files changed, 18 insertions, 0 deletions
diff --git a/src/plugins/platforms/cocoa/qcocoawindow.h b/src/plugins/platforms/cocoa/qcocoawindow.h
index 1e46cd2dde..4bff1de515 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.h
+++ b/src/plugins/platforms/cocoa/qcocoawindow.h
@@ -219,6 +219,8 @@ protected:
     void toggleFullScreen();
     bool isTransitioningToFullScreen() const;
 
+    bool startSystemMove() override;
+
 // private:
 public: // for QNSView
     friend class QCocoaBackingStore;
diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
index ad232d6d80..28da4fcf5d 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.mm
+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
@@ -291,6 +291,22 @@ void QCocoaWindow::setCocoaGeometry(const QRect &rect)
     // will call QPlatformWindow::setGeometry(rect) during resize confirmation (see qnsview.mm)
 }
 
+bool QCocoaWindow::startSystemMove()
+{
+    switch (NSApp.currentEvent.type) {
+    case NSEventTypeLeftMouseDown:
+    case NSEventTypeRightMouseDown:
+    case NSEventTypeOtherMouseDown:
+    case NSEventTypeMouseMoved:
+        // The documentation only describes starting a system move
+        // based on mouse down events, but move events also work.
+        [m_view.window performWindowDragWithEvent:NSApp.currentEvent];
+        return true;
+    default:
+        return false;
+    }
+}
+
 void QCocoaWindow::setVisible(bool visible)
 {
     qCDebug(lcQpaWindow) << "QCocoaWindow::setVisible" << window() << visible;