Merged patch #3519669.

src/cocoa_window.m

@@ -1168,7 +1168,7 @@ void _glfwPlatformSetMouseCursorPos(_GLFWwindow* window, int x, int y)
     // calculating the maximum y coordinate of all screens, since Cocoa's
     // "global coordinates" are upside down from CG's...
 
-    NSPoint localPoint = NSMakePoint(x, y);
+    NSPoint localPoint = NSMakePoint(x, window->height - y);
     NSPoint globalPoint = [window->NS.object convertBaseToScreen:localPoint];
     CGPoint mainScreenOrigin = CGDisplayBounds(CGMainDisplayID()).origin;
     double mainScreenHeight = CGDisplayBounds(CGMainDisplayID()).size.height;