Allow me to explain... I bought an early 2009 iMac (20" /2.66Ghz/8GB/320GB HDD) and received a "rebate" for a free printer. Awesome, so I get the HP Photosmart C4480 All-in-one and it works perfectly from Leopard on through Mountain Lion. Great. Once my wife and I use Mavericks, there is no driver available for the printer that I can find (the printing works but the scanning and copying functions are broken). Now, I received an HP scan jet 3500c (an old standalone scanner) along with an iMac G5 (which was given away to someone recently) not too long ago and thought to my self...."Why not try to use that scanner since the newish one is not working now." So....there are no drivers for that scanner since it is PPC Mac only from what I can tell and instead of being simple, I had to install OS X onto my iBook G4, update the system, download the software and then use the iBook basically as the scanner display. I enabled file sharing and now I have a scanner that works just fine (even if it is more than a decade old). Now why is it that I can do all of that to make a much older and obsolete piece of equipment work properly, but HP can't sufficiently release an update to their HP Scan Pro application with OS X 10.9 support????? Crazy. So now I have my iBook up and running (even if I have to have it plugged in for it to remember where the startup disc is) so that my scanner can work so that I can keep things rolling along at this point.