Could not run the sketch (Target VM failed to initialize) error

Hi to all, i'm new to programming and to processing. I've to do a school project, but i've some trouble with my mac.

this code (give to me by my teacher, for example) cause an error, and other example sketch make the same.

// SOUNDS import processing.sound.*;

// SOUND VARIABLES SoundFile cinguettio;

// ANIMATION VARIABLES int anim = 0;

void setup() {
size(160,90);

// frameRate(25); smooth(); noStroke(); }

void draw() {

anim=anim+1; myVis();

}

void myVis() { cinguettio = new SoundFile(this, "cinguettio.mp3");

PImage cava = loadImage("CaldanaGavorranoQuarry1_256.jpg"); // cava.resize(500, 0); imageMode(CENTER); image(cava, width/2, height/2);

PFont myFont = loadFont("SansSerif-12.vlw"); textFont(myFont); textAlign(CENTER); fill(255); text("I prati e le siepi intorno alla cava ...", width/2+anim, height/2);

cinguettio.amp(0.02); cinguettio.play();

}

The error is:

RtApiCore::getDefaultInputDevice: No default device found!

libc++abi.dylib: terminating with uncaught exception of type std::runtime_error: RtApiCore::probeDeviceOpen: the device (0) does not support the requested channel count. Could not run the sketch (Target VM failed to initialize). For more information, read revisions.txt and Help → Troubleshooting.

Can someone help me?