title: SQLDeveloper configuration on Mac
body: <p>I'm a student and need to practice Oracle SQL queries since we have Advance SQL in our syllabus. I have Intel-based MacBook Pro running Mac OS X Snow Leopard 10.6.8. I just downloaded the SQLDeveloper for Mac and unzipped it. The application executed and started well. But I'm not able to create any connections. I get the following error:</p>
  
  <blockquote>
    <p>Status: Failure -Test Failed:IO Error: The network adapter could not
    establish the connection.</p>
  </blockquote>
  
  <p>When I key in the following parameters:</p>
  
  <ul>
  <li>Connection name: hr.</li>
  <li>Username: hr.</li>
  <li><p>Password: hr</p></li>
  <li><p>Connection type: Basic</p></li>
  <li><p>Role: default</p></li>
  <li><p>Hostname: localhost</p></li>
  <li>Port: 1521</li>
  <li>SID: orcl</li>
  </ul>
  
  <p>Am I doing anything wrong? Do I need to install anything else? I'm newbie so please co-operate with me if I have ignored anything. I also Googled this error, found lot of search results but couldn't solve my problem. Any help would be highly appreciated.</p>