I'm running iTunes 11 on a retina MacBook Pro, and when I try to download HD movies, iTunes shows me a dialog alert saying "This cannot be played in HD on this computer." The dialog goes on to imply that I have a choice to proceed or to but the standard def version, but I don't see a way to buy the HD version.
Why can't iTunes 11 play HD movies on a retina MacBook Pro? Where's the "I wanna download it anyway" button?