diff --git a/src/posix/cocoa/i_input.mm b/src/posix/cocoa/i_input.mm
index 745b0c6dca..78841d9064 100644
--- a/src/posix/cocoa/i_input.mm
+++ b/src/posix/cocoa/i_input.mm
@@ -484,11 +484,14 @@ void NSEventToGameMousePosition(NSEvent* inEvent, event_t* outEvent)
 	const NSPoint   viewPos = [view convertPointToBacking:windowRect.origin];
 	const CGFloat frameHeight = I_GetContentViewSize(window).height;
 
-	const CGFloat posX = (              viewPos.x - rbOpts.shiftX) / rbOpts.pixelScale;
-	const CGFloat posY = (frameHeight - viewPos.y - rbOpts.shiftY) / rbOpts.pixelScale;
+	outEvent->data1 = static_cast<int16_t>(              viewPos.x);
+	outEvent->data2 = static_cast<int16_t>(frameHeight - viewPos.y);
 
-	outEvent->data1 = static_cast<int>(posX);
-	outEvent->data2 = static_cast<int>(posY);
+	// Compensate letterbox adjustment done by cross-platform code
+	// More elegant solution is a bit problematic due to HiDPI/Retina support
+	outEvent->data2 += (screen->GetTrueHeight() - screen->VideoHeight) / 2;
+
+	screen->ScaleCoordsFromWindow(outEvent->data1, outEvent->data2);
 }
 
 void ProcessMouseMoveInMenu(NSEvent* theEvent)