Converting CDR to ISO via Command Line

1. Converting a DMG to CDR

• Mount the DMG disk image you want converted to CDR format by double-clicking it in the Finder
• Launch Disk Utility found in /Applications/Utilities/
• Select the .dmg image from the sidebar list and then click the “Convert” button in the toolbar
• Pull down the “Image Format” menu and choose “DVD/CD master”, then click “Save”

2. Converting CDR to ISO via Command Line

hdiutil convert /path/imagefile.cdr -format UDTO -o /path/convertedimage.iso