I have read that the resulting ISO image is not a 'true' ISO-9660 filesystem and that you can use the following command to convert DMG images (leave the Image Format as compressed to create a DMG image in Disk Utility) into *real* ISO images using the following command: The ISO image can then be distributed and burned on any system (I tested this by burning the resulting ISO on a Windows XP machine using the free DeepBurner application). When Disk Utility is finished, you can browse to the file with Finder and rename the file from example.cdr to example.iso. cdr extension, even though the image itself is identical to a. In the example below, I use example as the filename.ĭisk Utility will create the disk image with the. Change the Image Format from compressed to DVD/CD master (compressed will save the file as a DMG image). On the Save As dialog, enter a name for your ISO image and choose the location where you want to save the file. Select the CD underneath the drive listed on the left and then click New Image in the tool bar at the top.

Insert the CD you want to create an ISO image from into your CDROM/DVD drive and then launch Disk Utility (Applications -> Utilities -> Disk Utility).