Ingesting professional sony beta and sx tape into iMac thru Canopus ADVC 110 I'm trying to capture sony beta and sx tape into my iMac. I know I need a device between the deck and computer. I believe that device is the Canopus ADVC 110 converter (have yet to purchase this.)  Will I be able to cable from that converter directly to the thunderbolt port on the iMac? There are no firewire ports on my iMac. Pretty confused on this process. thanks!
If you have firwire device but no firewire port you need an adapter. Apple offers one:
http://store.apple.com/us/product/MD464ZM/A/apple-thunderbolt-to-firewire-adapter

If you tape deck is offering an output that the Canopus supports you will be able to capture your tapes that way.
Alternatively you might want to look for a USB based solution that might be cheaper than using this device with an adapter.