Duplicating CDs on MacOS

First, install cdrdao – if you use macports: sudo port install cdrdao

To rip the CD to an image:

sudo cdrdao read-cd --device IODVDServices file.toc

To write the image back to CD:

sudo cdrdao write --device IODVDServices file.toc

Make sure that the CD isn’t mounted before reading, use disk utility to make sure.