I'm using a Macbook 10.7.5, Max 5.13. The audio tester works but when I try a simple patch with cycle~, gain~ and ezdac~, there's no sound and the audiotester stops making sounds until I trash my Max 5 preferences folder. Whether it's on or off or if I change the preferences in DSP Status, there seems to be no audible change.

There's probably something wrong with my patch because I tried one other I downloaded and it worked.