I have a mac pro and was wondering how i can open world of warcraft twice so i can use two accounts at once? I know for windows you can do it easily, but as of now i cant figure out how on OS X?
If you plan to dual or multibox on the mac i strongly suggest to limit the FPS on one of the clients.
It can be done with:
/console maxfps X
and
/console maxfpsbk X
where x is the max framerate it does display.
I usually set the background client to run at 30 fps (thus X=30)
Look into the application CloneKeys to use both clints at the same time and there are several addons that helps it beeing a bit easier, like jamba.