Anyone have any idea? I can't for the life of me mount any .DMG files on my Early 2011 MBP running Lion. I am not sure if I somehow changed a setting or if something crap out on me. Everything else seems to work normal. I have an iMac running Lion and I can mount the .dmg files so it is not the file themselves. Any Ideas? Thanks for you help guys. I have attached a window shot.