I'm downloading resources from Itunes, using NSBundleResourceRequest. The following code is using to pause the progress. var request = NSBundleResourceRequest(tags: [tags]) self.request.beginAccessingResources { error in if let error = error { onFailure(error) } else { onSuccess() } } @IBAction func buttonPauseAction() { self.request.progress.pause() } But download is not getting paused. Please help me on this, why I'm not able to pause. any reason for this Thanks in advance.