Pentaho Design Studio Not Working on Mac OS

I downloaded Pentaho Design Studio 4.0 for Mac and installed on MacBook Pro (OS X Version 10.8.2). I started PDS through Eclipse and loaded HelloWorld.xaction. When I tested it, I found following issues:
1. Pentaho Server URL field didn't show up correctly. I didn't see any space to fill URL correctly
2. I copied "localhost:8080/pentaho" to the URL, but nothing happpend when I clicked test button
3. I clicked Generate URL, seems it created the Generated URL correctly, but I can't run it. When I click Run, nothing happen
4. When I copied the generated URL to a web browser, it worked as expected
5. Browser URL is not working either

A screen shot image is attached for your reference.

Please let me know if anyone had similar experience with Mac OS X before.

Thanks.

Attached Images

• Screen Shot 2013-08-19 at 4.22.54 PM.jpg (21.1 KB)