Zorro Macsk II, Touchscreen Accessory For Apple iMac 27" (2009 to 2015, and Retina) This is not a monitor. It is an accessory to give your monitor touchscreen capabilities. Supports 4K, 5K, and all 27" versions, including the latest Retina iMac21.5. Compatible with OS X Yosemite and other older operating system versions. Also compatible with Windows 7, 8, 10 and Android. Includes a USB cable, for plug and play capability. Metal front and rear panels, and an overall thickness of just 0.26 inches. Designed to allow access to the iMac camera, logo, microphone, speakers, and fan. Use familiar operations and gestures similar to a trackpad. Secure to your iMac's surface using magnetism or adhesives.