SCDownloader is a tool for easy obtaining songs form Soundcloud.com. After downloading and running, this app will be available in your menu bar. You can simply paste the url of song you want to download, so you can download unlimited songs simultaneously into your folder you choose in settings. If you don't set the download folder, the default folder for downloading will be the Downloads folder in your home directory (/Users/Your Name/Downloads).
Mac OS X 10.10
Mac OS X 10.11