Mac client EXP rates

Is there any way for a GM to change my account's default EXP rate to 7x (instead of x10 right now on Frostmourne)? The Warmane Mac client doesn't have the 'right click on exp bar' function (as well as the mercenary mode toggle function) to change EXP rates.

Please tell me you guys can do it. The last time I made a ticket about this, a GM responded to me telling me to access my account on a Windows computer or ask a friend to do it. Well, I can't access a Windows computer, and I don't have any friends. PLZ HELP