OK, there is a LAME for MAC OS X but this may be a better job for FFMPEG.
So moving to the second thought here's my better search for how to deal with MP3 tags and metadata with FFMPEG.
https://www.google.com/#q=ffmpeg+extract+mp3+tags+command+line
Now you can script what you need and append the data to your CSV as needed.
Bob

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic