卷和安装应用程序路径 - MacOS可启动

Question

我正在尝试创建Sierra MacOS可启动USB，因此我使用终端来创建可启动设备。 在命令执行时，我收到此错误，因此无法创建可启动的USB：

我的USB和Application文件夹情况如下：

实际上我正在使用此命令创建可启动卷。

function generate_schedule($con,$sy,$year_id){

    $time = array(1=>'9:30-11:00',2=>'11:30-1:00',3=>'1:30-3:00',4=>'3:15-4:45');
    $days = array(1=>'Sunday',2=>'Monday',3=>'Tuesday',4=>'Wednesday',5=>'Thursday',6=>'Friday',7=>'Saturday');
    $rooms=array(1=>'302',2=>'303',3=>'304',4=>'701',5=>'702',6=>'704',7=>'901',8=>'902',9=>'1402',10=>'1405');
    // $yls = mysqli_query($con,"SELECT * from year_level_subject where year_id='$year_id'");
    $yls=mysqli_query($con,"SELECT * FROM year_level_subject as yls join subjects as s on yls.subj_id=s.subj_id where yls.year_id='$year_id'");
    $num=mysqli_num_rows($yls);
    $x = 0;
    echo '<table class="table table-bordered table-hover" id=" datatable">';
    echo '<thead>
          <tr>
          <th>Time</th>
          <th>Days</th>
          <th>Subject</th>
          <th>Teacher</th>
          <th>Room</th>
          </tr>
          </thead>';
    while($row=mysqli_fetch_assoc($yls)){
            extract($row);
            echo '<tr>';
            echo '<td><select id ="seltime" ><option value=0>Select Time</option>';
            foreach($time as $key => $value) {
            echo '<option value='.$key.'>';
            echo $value .'</option>';
            }
            echo '</select></td>';
            echo '<td><select class="selday" ><option value=0>Select Day</option>';
            foreach($days as $key => $value) {
            echo '<option value='.$key.'>';
            echo $value .'</option>';
            }
            echo '</select></td>';
            echo '<td>'.$subj_desc.'</td>';
            $teach = mysqli_query($con,"SELECT * FROM teachers");
        echo '<td><select id="selteacher" onchange="schedata(this)"  >
              <option value=0>Select Teacher</option>';
        while($row=mysqli_fetch_assoc($teach)){
            extract($row);
            echo '<option value='.$teach_id.'>'.$teach_fname.' '.$teach_mname.' '.$teach_lname.'</option>';
        }
        echo '</select></td>';
            echo '</select></td>';
            echo '<td><select name ="selroom" ><option value=0>Select Room</option>';
            foreach($rooms as $key => $value) {
            echo '<option value='.$key.'>';
            echo $value .'</option>';
            }
            echo '</select></td>';

        echo '</tr>';
    }
    echo '</table>';}

请给我一些建议。