Last Opened not clickable in Applications folder View Options
Date last opened was only available in Spotlight windows in 10.6 and earlier. It became available in normal Finder windows in 10.7.

http://www.mac-help.com/t205135-does-snow-leopard-have-last-opened.html


  
    One thing that's always annoyed me about Leopard is that the search
    results window has a Last Opened column, but an ordinary Finder window
    doesn't have that option.
    
    Of course, it also annoys me that the search results window is not an
    ordinary Finder window like it used to be, with Size, Created and all
    the other column options.
    
    Has Snow Leopard fixed this inconsistency?
  
  
  In list view 'Last Opened' is one of the options in Show View Options,
  but it's rather annoyingly greyed out.
  
  So: Yes, but no.