The Apple iMac is a pretty great all-in-one computer, but if you’re coming from the perspective of an iPhone or iPad, you want to touch that screen. Apple doesn’t have a touchscreen iMac just yet, but you can give yourself that functionality with the Zorro Macsk cover. No, that’s not a typo.
The idea here is very simple and it’s very easy to implement. The Zorro Macsk is made by a Chinese comapny called TMDTouch and it hooks up to your iMac via a simple USB connection. They only have a version for the 21.5-inch iMac at the moment, but you do get to choose from a variety of colors and the 27-inch version is reportedly in the works. The whole thing can be set up in about 10 seconds.
Perhaps the more interesting thing here is that it’s not a touch panel in the traditional sense. Instead, the Zorro Macsk uses infrared technology to track your touch input. You can then do all the trackpad and touchscreen things on your iMac at will and the accessory only costs $199. Touch-enabled Windows 8 all-in-one PCs are coming down the pipeline, so this is one way your iMac can keep pace with the Windows world.[Source]