title: Objective-C : Properties question
body: <p>As far as I understand when you use properties the compiler still converts them to accessor methods during compilation. I got a little irritated when I read you need OSX 10.5 or later to use properties. Why is that so?</p>
  
  <p>If in the compiled application are in fact still accessor methods I see no need for OSX 10.5. Or is there something else going on during run-time?</p>