I finally decided to replaced my four-year-old MacBook Aluminum out of concern the hard drive is about to fail. I can't be without a computer to use for remote access to work while traveling. I ordered a new MacBook Air. I was thinking of ordering a ThunderBolt display to put in my home office and ditch my iMac (also four years old). My wife has a 2.13 GHz MacBook Air (2010 model) with the Mini DisplayPort. Is this essentially a ThunderBolt port that needs an adapter? I'm assuming it would be compatible with the ThunderBolt display, but if I purchase an external hard disk (to keep video on), will she be able to access the hard disk when she plugs up the monitor (if the hard disk is connected to the ThunderBolt display)? Sorry, I did a search for this and got a bunch of irrelevant discussions.