Uwe, The patch works great for Mountain Lion. I am able to calibrate. At first, my ir didn’t recognize the full screen. I realized that the Wiimote Whiteboard screen 1 wasn’t set for 1024x768. After I reset my screen in my system preferences, it wasn’t until I rebooted everything that it worked. (I’m a little slow, so it took me an hour to figure that out.) Anyhow, thank you once again, Uwe! You ROCK!