The current system is Leopard, OS X 10.5.5 and
it runs just fine on a G4 1Ghz powerbook & a G4 1 Ghz iMac.
Yes, I ran Leopard on a G4 1.25 Ghz 15” powerbook. But from what I’ve read, it will not make the grade with the new Apple OS that will be rolling out.
I had no problems with Leopard on the G4 1.25 powerbook. When I gave it to someone, I left the OS on it.
Again, what I’m saying is I wouldn’t suggest spending $500 NOW for even a used G4 machine as it won’t be able to move ahead as Apple updates its OS with consistent and regular updates.
Just before I got the 2.4Gz Penryn 15” Macbok Pro, I was using my backup Mac Mini Intel Core Solo and it was getting pretty sluggish just handling my iPhoto library. The size of it was slowing down actions in that program.
Now it’s just much better all around.
Still haven’t seen the new Apple notebooks in person. I was very interested and waiting for those to roll out. But in the end the last generation Penryn model was so close in performance and the refurb price so appealing I went that way.
Now I am watching this Nvidia closely but that’s another story entirely.