One last thing, at the time of this writing I can't recommend the software for Mac. I had nothing but problems with it and it made for one very frustrating evening. I now run it on a windows 7 VM without issue. Just aheads up!
Ripley, did you try the latest version of the software or the older beta Mac-version? I'm looking to order the Pro version of FoCal today, and Reikan claims that it's now fully Mac compatible. What Mac are you using and what version of OSX?
I have a 2012 MacBook Pro running the latest OSX. I just bought FoCal last week so I have the lastest version of that as well. Camera is a 5D3. The problem came about when the software tried to transfer the image from the camera, it would just hang and eventually crash. I already had a copy of Windows 7 Pro 64bit running on Parallels so I just installed it there and everything runs fine. Same laptop, same camera, same cable, etc. Reikan technical support said "that sounds wierd" so I don't know how prevalent the issue is. It might work great for you with your configuration, who knows. Good luck.
BTW I love the software, highly recommend it!