Firewire to Thunderbolt? I need an advice. I have a 2010 iMac 27 inch. I have several hard drives (total of 5) all daisy chained by firewire going into my iMac. I have close to 300,000 photos stored on these hard drives. I use Lightroom as my catalogue program. I am thinking about updating this year later to iMac 27 inch 5K especially now since my Sony A7RII 4k videos are so great, but I want to see them in glorious 4k. However, I noticed all new iMacs have Thunderbolt and no firewire connection whatsoever. Am I stuck? How do I proceed? is there such a thing as firewire to thunderbolt connecting cable???