no, multiple iMac would tho
the more computer the better when rendering
really, you know this because...?
I run Maya 8.5 on my Macbook Pro C2D 2.16Ghz 2gig of ram and the basic things I do run fine. It all depends on the load you put on the machine. Having multiple machines and farming out the rendering can be done with mentalray which is bundled with Maya, but you are most likely using the PE edition that is free right?