A .DMG file is a disk image file which containing the entire contents of a CD or DVD that have been compressed into one file on a computer. DMG file is used primarily with the Mac operating system.
With WinArchiver, you can convert it to standard iso format or burn it to
a CD DVD disc.
1. Start WinArchiver.
2. Choose the menu item, "Tools --> Convert Disk Image
File...". The "dmg converter" dialog will display.
3. Enter the source dmg file path name, and the destination iso file path
4. Click "OK" to start converting dmg file to iso format.