I put in the leopard dvd and I click install computer restarts, but then the screen goes black and I get a box with the message input not supported, anybody have a clue what I should do? 
I have a Dual 1.8GHz PowerPC G5 Version 10.3.9 thank you in advance...
I have a Dual 1.8GHz PowerPC G5 Version 10.3.9 thank you in advance...