diff --git a/toonz/sources/toonz/sceneviewerevents.cpp b/toonz/sources/toonz/sceneviewerevents.cpp
index 9bb4f03f..833cea9b 100644
--- a/toonz/sources/toonz/sceneviewerevents.cpp
+++ b/toonz/sources/toonz/sceneviewerevents.cpp
@@ -957,6 +957,15 @@ using namespace ImageUtils;
 
 void SceneViewer::contextMenuEvent(QContextMenuEvent *e)
 {
+
+#ifdef MACOSX
+        //cleaning-up mousePressedEvent on MacOSX instead of mouseReleaseEvent called
+	m_mouseButton = Qt::NoButton;
+	m_tabletEvent = false;
+	m_pressure = 0;
+	m_buttonClicked = false;
+#endif
+
 	if (m_freezedStatus != NO_FREEZED)
 		return;