HOWTO Create ISO on Mac OS X

Found here:

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
Vendor   Product           Rev
MATSHITA DVD-R   UJ-835E   GAND

      Type: DVD-ROM              Name: /dev/disk1  Cur Write:    8x DVD          Sessions: 1  Max Write:    8x DVD            Tracks: 1

Overwritable:   00:00:00         blocks:        0 /   0.00MB /   0.00MiB
    Space Free:   00:00:00         blocks:        0 /   0.00MB /   0.00MiB
    Space Used:  364:08:27         blocks:  1638627 /   3.36GB /   3.13GiB
   Writability:
     Book Type: DVD-ROM


1. Unmount the disk with the following command:


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


1. Create the ISO file with the dd utility (may take some time):


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


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


$ hdid file.iso


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