Total noob question: Mac how-to guide?

[xxMayDay31xx]

i know it sounds needy, but if someone can give me a step by step on how to get going on a Mac, i would greatly appreciate it.
So i have an iMac that's almost 4 years old, has intel chip in it, but i don't really know any more since i've been exclusively a console gamer until now.
i own all the games i want to rip, i just want to give the Zelda and Mario games a whirl. No pirating from me.

So now, i have the program installed and the window says "Dolphin could not find any GC/Wii ISO's. Double-click here to browse for files"

So what now?

[HawaiianPunch]

Double click, and select the folder where the ISOs you ripped are. Or click open in the top left and open any ISO directly.

[xxMayDay31xx]

(12-09-2011, 12:54 PM)HawaiianPunch Wrote: Double click, and select the folder where the ISOs you ripped are. Or click open in the top left and open any ISO directly.

I don't know how to rip ISO's on a Mac.