I have a mac pro that orginaly shipped with Leopard. I had a failed experiment installing Windows to the computer and now it will not boot into anything. All I get is the message "no bootable device". I have tried holding X during startup and found that OS X is gone. I have put in my Leopard disk and held C on startup but it dose not boot into the disk and goes right back to the error. I've tried holding the Option Key on boot and still, it just goes back into the "no bootable device" error. If I place the Lepoard CD in at the error, and press the "any key" It will not do anything, just sit there. Anyone have an idea of what is going on? Just recently I installed Windows on 3 Intel iMac's and one gave me the same error. However booting to the OS X disk worked on those.