well, i've ran it on my dual 533 and it was fine. I think a dual 450 would have no prob

stu

Thanks!

I also ran it on a Dual 533 but it was an emergency situation, it worked but I would prefer not to.

and it does not use the dual processor - so you are basically running @ 450 Mghz

how can it not use the dual processor? I thought the whole point of Mac OS X was that individual applications don't have to be written to take advantage of >1 processor? The OS just handles it and everything runs faster.

hmmmmmm

any official word on this?

stu

Scratch LIVE uses both processors, but the Dual 450 G4 is still bellow minimum spec.

Oh - sorry for the bad advice - but I used it with my dual 533 one night cause my laptop HD failed. It worked but it stuttered a bit and made me very nervous - but it did work all night long (4 hours)

as far as I know, at the OS level, makes use of both processors; however, developers need to make their applications dual-processor aware. if the app isn't aware, it can only run its threads on one processor, so it can't, for instance, have one processor handle the graphics work while the other works on computing graphics.

oops that last line should read audio... have one processor handle the graphics work while the other works on computing audio.

The programming technique that takes advantage of multiple processors is called "multi-threading" and does not require the application to be aware of how many processors are available. Scratch LIVE makes extensive use of multithreading, so tasks (graphics, mp3 decoding etc) will be shared across processors.

[url=developer.apple.com]dual processor support[/url]

"Multiprocessing Services" is an OS9 technology.