Black Style Touch Screen for Imac 21.5-Inch- Zorro Macsk Apple iMac + Zorro Macsk = The Coolest All-in-One Desktop. Gesture recognition (zoom in/out scroll etc. ) Include all of the Apple Magic Trackpad gestures;Infrared rays interception detection, no extra sheet of glass or plastic within the canvas, so the picture quality isn't affected. No additional software requires to run; No install tools. Just plugs it into the back of the iMac with a USB cable. It is magnetically attached to the surface of the iMac. The stylish frame not only decorates the iMac but also protects the iMac from scratches and stops the dust from getting into the LED Screen. Support Mac OS ,Windows 7, Windows 8. But now, the size is not compatible with the new iMac (2012).