title: Creating a parenet less modal dialog or MessageBox or alert Sheets in cocoa?
body: <p>Issue1: 
  I want to show an alert window or message box before the Main Window of the Application is launched. When im using the NSRunAlertPanel() it is not showing the alert window.It is directly launching the Application's Main Window.</p>
  
  <p>Issue2:
  I want to create an Modal (login dialog) and message boxes in an thread spanned from the main thread.</p>
  
  <p>Its urgent </p>
  
  <p>So, Kindly reply soon...</p>
  
  <p>Thank You Pradeep.</p>