MacX YouTube Downloader is a great free online video/audio downloader for Mac OS that can download music and videos from over online video sites. It helpsSubcategory: Download Managers. Luckily there are some better options if you want to download audio from a website such as YouTube, Vimeo, Soundcloud, or another streaming audio source. You can also grab the audio from Author: Karen Haslam. The first thing that you will need to record audio from YouTube is a reliable YouTube audio recorder for Mac. You may find several audio recorder tools from the internet to extract audio from YouTube.