I have a mac mini that came with os x 10.3.7 discs. I upgraded it to 10.3.9 but later decided to upgrade to a 10.4. I purchased a set of brand new mac mini 10.4 discs (grey discs) of of ebay for really cheap. I have tried to install them numerous times but each time right after I pick the language a message comes up that says "cannot install software on this computer". I really don't know what to do since they are mac mini discs and i have a mac mini that I'm trying to use them on. Please help me I don't know what else to do and i don't what to buy the disc that is compatible with any computer since it is more than I want to pay for an older os.http://img.tomshardware.com/forum/uk/icones/frown.gif