1 - Go into Disk Utility and highlight the CD which is in the drive.
2 - Click “New Image” in the toolbar up above.
3 - Image format should be “DVD/CD master”. Name it whatever you want and save it where you like.
4 - Wait.
5 - When that is done, open up your Terminal.
6 - Goto the path where you saved it (ie: “cd ~/Desktop”).
7 - Issue this command:
hdiutil makehybrid -iso -joliet -o FILENAME.iso FILENAME.cdr
8 - Rejoice and burn your ISO. Or just burn your CDR since Mac’s support that.
2 - Click “New Image” in the toolbar up above.
3 - Image format should be “DVD/CD master”. Name it whatever you want and save it where you like.
4 - Wait.
5 - When that is done, open up your Terminal.
6 - Goto the path where you saved it (ie: “cd ~/Desktop”).
7 - Issue this command:
hdiutil makehybrid -iso -joliet -o FILENAME.iso FILENAME.cdr
8 - Rejoice and burn your ISO. Or just burn your CDR since Mac’s support that.
The content comes from the following link
http://blog.andypeters.org/post/49316583/convert-cdr-to-iso-in-mac-leopard
