I spent the money on iStat Menus (not the dashboard widget), hoping to get better fan control than SMC. It is on a 2011 Air ultimate. When I go to change the speeds, it doesn't actually work. I've rebooted my machine, still when I choose the active setting (high 5000rpm), the machine just stays at the default 2000rpm. What is the deal here, how can I get this thing working?