Upon launching Vice City I get nothing but a blank screen, turning up the speakers full I can hear a faint sound of what seems to be the games intro music but no image at all I had previously purchased Vice City from the App Store when I still had my old iMac, despite its age (early 2006 Core Duo!) it ran reasonably well. Now I've replaced that with a new 2011 Mac Mini. After transferring all my data to it I thought I'd try out Vice City see how it runs, but I decided to copy it from my iMac backup to save the download. I got a message that said I'd purchased on another machine and asked me to log in to verify I was using the same account, which I did and the App store seemed fine with. I did delete it and re-download but to no avail and no idea what could be causing it. all my other apps bought from the App Store work with no issues and some of the larger ones were also transferred from iMac backup. I'm running OS X Lion 10.7.1 on a 2011 Mac Mini 2.3GHz i5, 8GB RAM, Intel HD3000 powering a Dell U2412M @ 1920x1200 if it helps.