So I've read all this confusing mumbo jumbo on how backwards compatible the thunderbolt cable is and isn't between models that support only one of the 2. Although, I'm yet to find anything on whether I can use 2 devices with Mini display ports and connect them with thunderbolt. I'm naturally leaning towards the idea that I can't, but I'd love to hear from others. I was initially told I could from an apple employee, but haven't had any luck. Using a late 2009 imac to a 2011ish macbook pro. Both with Mini display ports.