cdr file extension you need to turn on “show filename extensions” in Finder’s preferences first. To convert the cdr file simply rename the extension to iso in Finder. You should now have a cdr image file ready to convert to iso. It should only take a few minutes depending on the size of your image. Select the dmg file in the sidebar and click the “Convert” button.Ĭhoose a name and location for the image, and select “DVD/CD Master” under “Image Format”, and click “Save”.ĭisk Utility will begin the conversion. It’s located in the “Utilities” folder inside the “Applications” folder. A cdr file is essentially an uncompressed, raw disk image.įind the dmg file you wish to convert and double click to mount it in Finder. The first step is to convert your dmg file to cdr using Mac’s Disk Utility. If that’s what you’ll need to do skip down to the command line method. But it won’t work if you want to use the iso file to burn a bootable CD or DVD. This method uses Disk Utility to convert to cdr and then iso.
