Firefly can be slow and it does depend on what options you have ticked and if you're ray tracing with a lot of bounces it's even slower. As softriver says, only tick what you need to do the image that you want. It's far better at the finished article than the P4 render engine by the way. I don't know about Mac speeds but I run my P5 on a 1.8GHz P4 processpr with 512 RAM and a 128 Nvidia graphics card. Happy days and long life friend!

Injustice will be avenged.
Cofiwch Dryweryn.