Hi Mitch,
Yes MacCaption works together with the Final Cut Suite apps and lets you output to tape, disc, or files with closed captioning, without the need for any additional captioning hardware.
The exact workflow depends on what format(s) you need to output to, but we have workflows for all the common editing hardware (AJA, Matrox, Blackmagic, Firewire) and file formats used with Final Cut Pro.
If you'd like to learn more, feel free to contact me directly at CPC. We also have a free demo software you can download and try, and free video tutorials about the different workflows on our website.
Hope this helps,
Jason Livingston
CPC Closed Captioning