Get MAC address with extendscript

I found a code for getting MAC address.

it works on win but not work on mac os.

Where is the mistake?

var name;
    if($.os.indexOf('Macintosh')!=-1){
        
        name = system.callSystem("ifconfig en1 | awk '/ether/{print $2}'");
        
        name = name.replace (/[:]/g, "");
    }else{
        var name = (system.callSystem("getmac"))
        name=name.replace("\n",'')
        var patt = /[0-9A-Z]-[0-9A-Z]{2}-[0-9A-Z]{2}-[0-9A-Z]{2}-[0-9A-Z]{2}-[0-9A-Z]{2}/ig;
        name = patt.exec(name);
        name = name[0]
        name = name.replace (/[-]/g, "");
    }
    name = name.replace("\n",'');
    name = name.replace (/0/g,"k");
    name = name.replace (/1/g,"N");
  alert( name);