>She could boot from a DVD to upgrade the OS and install software. That >was when the DVDs mounted.
Great. You have established that: 1) The drive works 2) The drive is able to read DVD format Next thing to try is booting into safe mode (startup with shift key down). That should prevent any secondary drivers from loading and clinch the theory that it is a software driver problem. Time to delete the /System/Library/Extensions.kextchach file. If that fails to resolve it look in /System/Library/Extensions/ for any odd .kext files that look like they may be related to the optical drive. Move them to the desktop and do a regular restart to see if they are the problem. Has she installed anything like an old version of Toast or drivers that came with some drive? It is very unusual to have to do this type of debugging of OS X. ************************************************************************* ** List info, subscription management, list rules, archives, privacy ** ** policy, calmness, a member map, and more at http://www.cguys.org/ ** *************************************************************************
