On 15 Dec, 2007, at 4:40 PM, Neil wrote: > But, is 10.5 slower than 10.4? I can't tell you that because I don't have any program installed on my G4 that will tell me the speed of performance for a specific action. I never bothered to clock any operation anyway, so there is nothing to compare it to except my eyeball-guess. Now that 10.5 is on the G4, I am using my PPC G5 most of the time because it is faster than my G4 ever was under any circumstance, and, besides that, the G5 is the newest toy on the desk, so I would rather play with it. I can say that my eyeball-guess is that OS-10.5 on the G4 is faster than OS-10.4.9 was. Remember, though, this is just an eyeball-guess and your mileage may vary.