How to Create ISO Image From CD/DVD Using OS X Terminal

Check which device name your DVD/CD drive has (use this name for the rest of the commands):

$ drutil status

Should look something like:


Unmount the drive:

$ diskutil unmountDisk /dev/disk2

There should be a message similar to: “Unmount of all volumes on disk2 was successful.”

Use dd to create the ISO image:

$ dd if=/dev/disk2 of=filename.iso bs=2048

Syntax is quite simple; if = input file, of = output file.

Building of ISO image might take around 10 minutes, depending of course of your CD/DVD size.