Just remember that the application needs to be open before you download. You can now start downloading programmes. Open the Applications folder in Finder and double-click BBC iPlayer Downloads.Drag the BBC iPlayer Downloads icon into the Applications folder (shown in the same window).A window with a BBC iPlayer Downloads icon should appear.Double-click the file after it's been downloaded.
You'll need to install the BBC iPlayer Downloads application in your application folder: Go to the BBC iPlayer installation page and select the link to download.