Quote Originally Posted by Valsharess View Post
Duplicate the world of warcraft folder (it is in Applications), then create 2 warcraft accounts, run both, start Plexer, press Add on Plexer, bring both WoW instances to the foreground, choose a toggle broadcasting key in Plexer, and press that key. That is mostly it.
Actually you can just dupilcate the WoW executable in the applications folder. Saves a lot of disk space and also saves you needing to dupilcate addons/settings etc.