Are you sure you weren't at compudumb instead?the guy at compusmart told me no so i didnt buy it was he wrong?
The misconception might be based on the relatively weak integrated graphics.
Photoshop is processor-based and runs fine on any current Mac as long as it's CS3.
Even with the integrated graphics issue, with enough physical ram, it works just fine - maybe a hair slower than a machine with dedicated graphics.
I have a CD macbook with 2 gigs of RAM and can run CS2 just fine. Its slow, but it gets the job done. I imagine the native CS3 version would run extremely well.