I've seen a bunch of free software out there that does this but I don't know which ones are worthwhile. And I need one that works with Mac OS. Any thoughts?
I don't know if it works with Mac, but dBpoweramp music converter works great for me for all my conversion neeRAB (Flac, OGG, etc.). It's not free, but it has a fully functioning 30 day trial and I found a cracked version somewhere.