Hello,
Few day ago, I post this problem on the forum Processing, but no answer. So I post here, may be with more succes ?
I try to open file.app from processing, but nothing happen when I do that. The target app is a processing app, make with processing 2b9. I use P 2b9, on OS Lion, classic I-mac 2012

void setup() { size(300,300 ) ; }
void draw() { }
void mousePressed() {
// open("targetAPP.app") ;
open("/Users/stanislasmarcais/Desktop/CODE/Fonction Processing/INTERFACE : AFFICHAGE/SauvegardeChargement/OpenApp/data/targetAPP.app") ;
}

Maybe I miss something in my code, but I think no. because it's very simple code.

Thx for your help

Stan