i searched for about a week to see how to rip wii games on mac directly. every time i searched it was for windows and i did not want to run bootcamp. anyways, after the search i decided to try to do it with out a guide and i figured it out. by the way i searched this forum as well but didn't find any thread about it.
Steps:
Put wii game into disk drive
open up disk utility if it didn't already opened ( you will not see the game in the finder, or at least i didn't)
in disk utility click on the cd/dvd drive
then go to file new disk image from disk one (i don't remember what its called exactly , but i do know that it is the last option it gives you in that sub menu)
Save the .dmg to your desktop
then open terminal
type "cd desktop" press enter
Type "hdiutil convert filename.dmg -format UDTO -o filename.iso (change filename to what ever you filename is.)
the game iso will show up as filename.iso.cdr
just delete the .cdr part. it will ask you if you want to keep cdr or use iso, just use iso.
then download wiijunkies
Here
open wii junkies
select your iso
and change the region to whatever region you are even if it is already in your region hit apply.
then burn using disk utility burning at 4x