When you say printing CD labels, do you mean on paper or as Ink.
Best way is to buy White Printable CDRs/DVDRs and use Epsons Print CD program.
Then of course you will need an Epson printer that can print on CDs.
I believe in his op that he wanted to print printable CDs using a MAC OS, his Epson XP-800 came with the Epson Print CD app.
He never came back here, so we don't know where he stands.....