OK,
I have some old DVCPro SD tapes and have been trying to do the same thing. I do have a older Mac Pro I hooked up since it has firewire 400 and I found a DVCPro AJ-D250 deck that has fire400 connections. I first tried going into Final Cut X. But it seemed to create some audio issues. Not sure if was because I have AJA Kona LE card installed, but I was going direct from the deck to the computer. Using the Dv import tool in Final Cut X.
However, then I tried just using QuickTime to record the file as a proRes file. Seems to be a better option for me.