title: why [NSCursor IBeamCursor] is null?
body: <p>The problem is that <code>[NSCursor IBeamCursor]</code> returns null for me.
  You can try:</p>
  <blockquote>
  <p>clang main.m -framework AppKit</p>
  </blockquote>
  <p>source:</p>
  <pre><code>#import &lt;Foundation/Foundation.h&gt;
  #import &lt;AppKit/AppKit.h&gt;
  #import &lt;AppKit/NSWindow.h&gt;
  
  int main(int argc, const char * argv[]) {
    @autoreleasepool {
      NSCursor * c = [NSCursor IBeamCursor];
      NSLog(@&quot;IBeamCursor = %p %@&quot;, c, c);
    }
    return 0;
  }
  </code></pre>