I’ve got a 2008 (early?) 24” iMac, and I’ve just picked up a 27” display, I think it’s a Thunderbolt. The iMac has what looks like a mini DVI video out socket, the monitor looks like Thunderbolt- I’m guessing as I’ve never used thunderbolt previously. Been looking for an adapter, but haven’t found one. Any ideas? I’ve got photos.