PS3 controller Bluetooth mac app?

I'm trying to pair my controller to my mac I did that. I downloaded an called joystick mapper to choose all the presets/replacement buttons for the computer that use like in game maybye. But I have to make the joystick app responsive for it to work. So if like go to a game like minecraft or somthing where the joystick mapper isn't responsive cause i'm using another the app I can only use the ps3 controller for 20 seconds and then I can't use it anymore I have to go back to my mac and press the app again for my controller to work:/ any other apps to make work to connect my ps3 controller free? Or anyway to stop this only 20 second use?