Hi Guys, I hope it's OK to ask this question and that it doesn't contravene any sort of Piracy rules. I want to buy some version of OS X for my Mac. (see the specs of it at the bottom) I have my heart set on Tiger but maybe my wallet will say that Panther is good enough, lol Ebay has loads of Mac OS software for auction but how do you tell if the software will work on my system and not just the exact Mac it was made for? Did I read somewhere that the colour of the disc is important? BTW, I'm not talking about a CD-R copy of an original disc (or 3) I mean an original set of discs that the seller no longer has any use for. Cheers, Steve __________________ PowerMac G3 B/W @ 400 Mhz, 512meg Ram and 12 gig HDD running OS 9.2.1 but slowly working on upgrading it.