The PowerCurl Cord Wrap from Quirky works for all MacBook power adapters including the MacBook Air, Pro and Retina. The basic idea is to avoid having to deal with a tangled-up mess every time you need to use extension cords. You can wrap both ends around the device, which makes it easy to unravel whenever you need it. The plug end of the cord clips to itself and the adapter fits in snugly into the middle, with the cord wrapped around it. When you need the cord, all you need to do is take off the flexible protective covering and pull out the cord. When you’re done, wrap the cord back round it and put the cover back on to keep it secure.