Hi guys a little bit of a problem at the moment with a new 27" late 2012 imac. I am using the old mini display port connector that I used to use with my old 2010 macbook pro, and at that time it was running flawlessly. now that I connect it to the thunderbolt socket (potential problem?) it does not work. the guys at the apple retail store told me that it would work that way and that I didnt need to purchase anything else for it to work. oh and another potential source of problem is that I am using a dvi to vga converter as my external monitor only accepts vga. (yes it is old I know haha) so basically the set up looks either like: 2012 imac (thunderbolt) -> mini display port-> dvi to vga converter -> vga cable -> external monitor or 2012 imac (thunderbolt) -> mini display port-> dvi cable -> dvi to vga converter -> external monitor both do not work. is this because I am not using a thunderbolt to vga/dvi peripheral or is it because the converter is not working? I have multiple of these converters but none work. Hope I've explained enough of the details, hope someone can solve this problem as no one in the apple store can tell me what I'm doing wrong. haha Thank you!