Hey, if anyone can help me out that would be great. Here is what's wrong, I recently purchased a PowerMac G4 MD, its a dual 867mhz and 800MB of Ram.... What I wanted to do is install 10.5 Leopard, which I know this machine can easily run.... The problem is any disk I put into the Super Drive gets ejected after a few seconds, I tried using another optical drive and it would not recognize the disk, then I tried a external optical drive, and this one would recognize the install disk, but as soon as I would restart it to began the installation, it would load back into Tiger. I already tried holding C with all three optical drives and holding option, when I use the external optical drive, you can see the install disk when I hold option, but it wont boot from that.. I have never had any issues with any of my Macs, if anyones how to fix this issue, let me know, I would greatly appreciate it.