a good youtube mp3 downloader for my mac?

I use to have the youtube downloader on my firefox and that would allow direct mp3 downloads, but l unfortunately "updated" and ended up with the Firefox addon which doesnt seem to allow direct mp3 downloads without downloading the video as well which l dont want. is there a good mp3 downloader recommended, and l do rarely require mp4 video format.

thanks

Well, there's not pirating music ... you could try that ...