It’s important to point out the file extension method typically works fine on a Mac but if you want to use the resulting image to burn a bootable disk, or burn it through Windows or Linux, you’ll probably want to go with the more complete method shown below. iso and accept the changes by selecting “Use. If you don’t have file extensions showing in Mac OS X you’ll need to do that first, then just rename the extension to. iso disk image, and in fact you can often convert the cdr to iso just by renaming the file extension from the Finder. Now if you want to get the CDR file to ISO format, there are a few easy ways to do that. It’s also immediately visible in the Disk Utility sidebar if you want to do something else with the file. Pull down the “Image Format” menu and choose “DVD/CD master”, then click “Save”Ĭonversion happens very quickly and you’ll find the converted CDR file at the destination where you saved it.dmg image from the sidebar list and then click the “Convert” button in the toolbar

Launch Disk Utility found in /Applications/Utilities/.Mount the DMG disk image you want converted to CDR format by double-clicking it in the Finder.Going from DMG to CDR is as easy as it gets:

Mac disk image utility