title: checkResourceIsReachableAndReturnError always return Domain=NSCocoaErrorDomain Code=4 "The operation couldn’t be completed. (Cocoa error 4.)"
body: <p>I am trying to use: checkResourceIsReachableAndReturnError of NSURL class</p>
  
  <p>But I always get FALSE and the NSError shows : Domain=NSCocoaErrorDomain Code=4 "The operation couldn’t be completed. (Cocoa error 4.)"</p>
  
  <p>I checked the URL with safary and it works, any idea?</p>