I am trying to create an installer DVD from the above .iso image and am unable to do so. When attempting to use Disc Utility to mount the image I am alerted, "Unable to burn 'lubuntu-15.04-desktop-i386.iso' (Resource temporarily unavailable). Double-clicking the image (to mount it to the desktop) results in the Warning "The following disk images couldn't be opened" Image: "lubuntu-15.04-desktop-i386.iso" Reason: Resource temporarily unavilable. Finally, Toast does not permit mounting the image. I have tried several different methods of mounting this disc image, all to no avail.
Are there any solutions to this issue?