I created a DVD+R disc on my new Mini that has some Mac apps. Now that my new iMac is here, I am trying to read the disc on my iMac but the iMac just spits it back out. It never shows up on the desktop. Other discs such as the reload discs work. I can put it in the Mini again and it shows up. Anyone seen this and know how to share discs between the Mini and the iMac?