I dug this out of the closet tonight and thought I'd try to install it on my iMac Power PC- G5. This is the National Geographic 110 years Cd-Rom set. I bought it in 1998 and used it with a previous Mac running OS 9. The install seemed to go O.K. My Mac started Classic and it allowed me to install the viewing program. Unfortunately, when I load a disc, nothing happens. Classic doesn't start and manually double clicking the Nat. Geographic app does nothing. I was hoping someone on this forum might have this old set and give me some advice. I'd hate to trash a CD-Rom set with the first 110 years of the magazine if there was some way to view it in Classic. The magazine isn't producing this type of set anymore (although a PDF set would be much more user friendly!) Thanks for any help.