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How to make a backup copy (ISO image) of a CD or DVD using the MacOS dd command alvin December 10, 2017 - 5:22pm
Table of Contents1 - Step 1: Insert a CD or DVD2 - Step 2: Find the CD/DVD identifier3 - Step 3: Unmount the drive4 - Step 4: Copy the DVD with the dd command5 - Step 5: Eject your media

If you want to make a backup copy (an ISO image) of a CD or DVD on a MacOS system using the Unix dd command at the Mac Terminal command line, I’ll demonstrate the process in this tutorial.

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Step 1: Insert a CD or DVD

Assuming that you’re using an external CD/DVD drive, the first step is to connect your drive to your computer, and then insert a CD or DVD. If you insert a movie or music CD and an application automatically starts playing, quit that application.

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