diff --git a/src/plugins/platforms/cocoa/qcocoahelpers.mm b/src/plugins/platforms/cocoa/qcocoahelpers.mm
index 12be222ab3..7ba7908d27 100644
--- a/src/plugins/platforms/cocoa/qcocoahelpers.mm
+++ b/src/plugins/platforms/cocoa/qcocoahelpers.mm
@@ -287,12 +287,25 @@ Qt::MouseButton cocoaButton2QtButton(NSInteger buttonNum)
   and "no button". Only NSEvents that describes mouse press/release/dragging
   events (e.g NSEventTypeOtherMouseDown) will contain a valid
   button number.
+
+  \note Wacom tablet might not return the correct button number for NSEvent buttonNumber
+  on right clicks. Decide here that the button is the "right" button.
 */
 Qt::MouseButton cocoaButton2QtButton(NSEvent *event)
 {
-    if (event.type == NSMouseMoved)
+    switch (event.type) {
+    case NSMouseMoved:
         return Qt::NoButton;
 
+    case NSRightMouseUp:
+    case NSRightMouseDown:
+    case NSRightMouseDragged:
+        return Qt::RightButton;
+
+    default:
+        break;
+    }
+
     return cocoaButton2QtButton(event.buttonNumber);
 }
 
diff --git a/src/plugins/platforms/cocoa/qcocoasystemtrayicon.mm b/src/plugins/platforms/cocoa/qcocoasystemtrayicon.mm
index 773f4b833f..0158895441 100644
--- a/src/plugins/platforms/cocoa/qcocoasystemtrayicon.mm
+++ b/src/plugins/platforms/cocoa/qcocoasystemtrayicon.mm
@@ -296,7 +296,7 @@ QT_END_NAMESPACE
     [self setNeedsDisplay:YES];
 }
 
-- (void)mousePressed:(NSEvent *)mouseEvent button:(Qt::MouseButton)mouseButton
+- (void)mousePressed:(NSEvent *)mouseEvent
 {
     down = YES;
     int clickCount = [mouseEvent clickCount];
@@ -306,13 +306,13 @@ QT_END_NAMESPACE
         [self menuTrackingDone:nil];
         [parent doubleClickSelector:self];
     } else {
-        [parent triggerSelector:self button:mouseButton];
+        [parent triggerSelector:self button:cocoaButton2QtButton(mouseEvent)];
     }
 }
 
 - (void)mouseDown:(NSEvent *)mouseEvent
 {
-    [self mousePressed:mouseEvent button:Qt::LeftButton];
+    [self mousePressed:mouseEvent];
 }
 
 - (void)mouseUp:(NSEvent *)mouseEvent
@@ -323,7 +323,7 @@ QT_END_NAMESPACE
 
 - (void)rightMouseDown:(NSEvent *)mouseEvent
 {
-    [self mousePressed:mouseEvent button:Qt::RightButton];
+    [self mousePressed:mouseEvent];
 }
 
 - (void)rightMouseUp:(NSEvent *)mouseEvent
@@ -334,7 +334,7 @@ QT_END_NAMESPACE
 
 - (void)otherMouseDown:(NSEvent *)mouseEvent
 {
-    [self mousePressed:mouseEvent button:cocoaButton2QtButton([mouseEvent buttonNumber])];
+    [self mousePressed:mouseEvent];
 }
 
 - (void)otherMouseUp:(NSEvent *)mouseEvent
diff --git a/src/plugins/platforms/cocoa/qnsview_mouse.mm b/src/plugins/platforms/cocoa/qnsview_mouse.mm
index 34ac1126ad..1f04c40f8e 100644
--- a/src/plugins/platforms/cocoa/qnsview_mouse.mm
+++ b/src/plugins/platforms/cocoa/qnsview_mouse.mm
@@ -211,12 +211,12 @@
                                              buttons, button, eventType, modifiers);
 }
 
-- (bool)handleMouseDownEvent:(NSEvent *)theEvent withButton:(int)buttonNumber
+- (bool)handleMouseDownEvent:(NSEvent *)theEvent
 {
     if ([self isTransparentForUserInput])
         return false;
 
-    Qt::MouseButton button = cocoaButton2QtButton(buttonNumber);
+    const auto button = cocoaButton2QtButton(theEvent);
 
     QPointF qtWindowPoint;
     QPointF qtScreenPoint;
@@ -241,12 +241,12 @@
     return true;
 }
 
-- (bool)handleMouseDraggedEvent:(NSEvent *)theEvent withButton:(int)buttonNumber
+- (bool)handleMouseDraggedEvent:(NSEvent *)theEvent
 {
     if ([self isTransparentForUserInput])
         return false;
 
-    Qt::MouseButton button = cocoaButton2QtButton(buttonNumber);
+    const auto button = cocoaButton2QtButton(theEvent);
 
     // Forward the event to the next responder if Qt did not accept the
     // corresponding mouse down for this button
@@ -257,12 +257,12 @@
     return true;
 }
 
-- (bool)handleMouseUpEvent:(NSEvent *)theEvent withButton:(int)buttonNumber
+- (bool)handleMouseUpEvent:(NSEvent *)theEvent
 {
     if ([self isTransparentForUserInput])
         return false;
 
-    Qt::MouseButton button = cocoaButton2QtButton(buttonNumber);
+    auto button = cocoaButton2QtButton(theEvent);
 
     // Forward the event to the next responder if Qt did not accept the
     // corresponding mouse down for this button
@@ -353,59 +353,56 @@
 
 - (void)mouseDragged:(NSEvent *)theEvent
 {
-    const bool accepted = [self handleMouseDraggedEvent:theEvent withButton:[theEvent buttonNumber]];
+    const bool accepted = [self handleMouseDraggedEvent:theEvent];
     if (!accepted)
         [super mouseDragged:theEvent];
 }
 
 - (void)mouseUp:(NSEvent *)theEvent
 {
-    const bool accepted = [self handleMouseUpEvent:theEvent withButton:[theEvent buttonNumber]];
+    const bool accepted = [self handleMouseUpEvent:theEvent];
     if (!accepted)
         [super mouseUp:theEvent];
 }
 
 - (void)rightMouseDown:(NSEvent *)theEvent
 {
-    // Wacom tablet might not return the correct button number for NSEvent buttonNumber
-    // on right clicks. Decide here that the button is the "right" button and forward
-    // the button number to the mouse (and tablet) handler.
-    const bool accepted = [self handleMouseDownEvent:theEvent withButton:1];
+    const bool accepted = [self handleMouseDownEvent:theEvent];
     if (!accepted)
         [super rightMouseDown:theEvent];
 }
 
 - (void)rightMouseDragged:(NSEvent *)theEvent
 {
-    const bool accepted = [self handleMouseDraggedEvent:theEvent withButton:1];
+    const bool accepted = [self handleMouseDraggedEvent:theEvent];
     if (!accepted)
         [super rightMouseDragged:theEvent];
 }
 
 - (void)rightMouseUp:(NSEvent *)theEvent
 {
-    const bool accepted = [self handleMouseUpEvent:theEvent withButton:1];
+    const bool accepted = [self handleMouseUpEvent:theEvent];
     if (!accepted)
         [super rightMouseUp:theEvent];
 }
 
 - (void)otherMouseDown:(NSEvent *)theEvent
 {
-    const bool accepted = [self handleMouseDownEvent:theEvent withButton:[theEvent buttonNumber]];
+    const bool accepted = [self handleMouseDownEvent:theEvent];
     if (!accepted)
         [super otherMouseDown:theEvent];
 }
 
 - (void)otherMouseDragged:(NSEvent *)theEvent
 {
-    const bool accepted = [self handleMouseDraggedEvent:theEvent withButton:[theEvent buttonNumber]];
+    const bool accepted = [self handleMouseDraggedEvent:theEvent];
     if (!accepted)
         [super otherMouseDragged:theEvent];
 }
 
 - (void)otherMouseUp:(NSEvent *)theEvent
 {
-    const bool accepted = [self handleMouseUpEvent:theEvent withButton:[theEvent buttonNumber]];
+    const bool accepted = [self handleMouseUpEvent:theEvent];
     if (!accepted)
         [super otherMouseUp:theEvent];
 }