[Tutorial] Converting DMG to ISO image on MAC

  4:44 PM    Santosh

There are few ways to convert MAC DMG image to ISO but none work for me. It fails with "The file format is invalid or unsupported" or "Can'nt find the file or file isn't CD image file" error. "The file format is invalid or unsupported"Is this kind of message telling you that file are corrupted? No.. DMG file is not corrupted. You can convert DMG to ISO via MAC OS x. Follow below steps for converting DMG to ISO.
Login to MAC 
Open Disk Utility which is located in Applications>Utilities folder as shown below,
 Open Disk Utility,
 Drag your DMG disk image into the left-hand pane of Disk Utility as shown below. Click on the file you just dragged & click on Convert
Select 'DVD/CD Master' from the 'Image Format'  Name your destination file, with '.cdr' at the end of the filename. Click on Save as shown below.
Disk Utility will convert the DMG file to an ISO image. 
 Now replace the 'cdr' at the end of the filename (in the Finder) to 'iso'.