Today I downloaded a .dmg file and it will not mount. Actually, no .dmg will mount. I get a Warning window that says the disk images failed to mount and the reason is that the Device is not configured. I am running G5 dual 1.8 with the latest update osx 10.4.8. I have repaired permissions and no worky. Power cycled and no worky. Tried to mount with disk utility and no worky. Does anyone have suggestions? Will I need to reinstall osx? Thank you.