So,shoved my macbooks Leopard install disc in my macpro (raid10,10.4.11) by mistake as I thought that is was shakes disk. Improptu decided to check out how the installation would go (picking up the leopard official disks tomorrow.honestly) and restarted the computer for install. After choosing the language there came a text that "installation to this machine is not possible". Neither was it possible to eject the disk in any way. So after that I was stuck in a desperate loop as the computer didnt allow to choose the boot drive (raid10) either. After a while it finally allowed it but suprisingly it showed : disk1,disk2,disk3 and disk4... No raid. Hmm. After clicking the disk1 the computer started relatively normally and managed to eject the dvd. Hmm. Was it because : A) The disk was macbooks specific that it does not allow to install it B) Was there some drivers or stuff lacking or C) Is so that Leopard justdont want to install on a raid10 system disk? D) Something else? Any input would be appreciated so that I dont end up buying a product that I cant install or whatnot. Cheers!