If you have a CloneCD image and you want to convert it to a “normal” iso file to use it on your mac, then the following should help:
First you need Macports (always good to have)
Then go to the Terminal App and enter:
sudo port -v selfupdatesudo port install ccd2iso
After that you’re good to go:
ccd2iso /path/to/image.img /path/to/cd.iso