Ruined my G5 2gig Dual Processor... had to do archive & restore. Tried again (more fool me) & same thing happened. YUK ! Only good thing about it was that it spurred me into joining VersionTracker at Pro level which I think is a great tool. It's a bit rich when Apple brings out an update that crashes its premier product (it worked fine on my G3 powerbook.) PS You can open the CD drive with a straightened paper-clip as before...just lift aluminium flap first