1. Put the CD or DVD into the drive
2. Open Disk Utility (Applications -> Utilities)
3. Select the inserted disk
4. Select File -> New -> Disk Image (It should be the name of the disk you want to make an ISO of)
5. Select CD/DVD master from the “image format” drop down menu
6. Click save
7. This creates a .cdr extension which is the same as a .iso
Just rename the file to .iso and your all done.
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