Create ISO CD/DVD image (.iso) with Mac OS X

1. Insert CD/DVD source

2. Fire up a Terminal, you can then determine the device that is you CD/DVD drive using the following command:

$ drutil status

3. Umount the disk with the following command:

$ diskutil unmountDisk /dev/disk1
Disk /dev/disk1 unmounted

4. Create the ISO file with the dd utility:

$ dd if=/dev/disk1 of=filexxx.iso bs=2048

5. Test the ISO image by mounting the new file (or open with Finder):

$ hdid filexxx.iso

6. The ISO image can then be burnt to a blank CD/DVD.