Now, there are a number of free audio converters for MAC. So, an audio converter for Mac is essential to convert audio files to MP3 for the ultimate use of music portability. MP3 audio can be played on ALL portable devices, transferred onto disks, and even played on car stereos and regular radios. The universal audio format for MAC, Windows, iPod, and other electronics, is MP3. You may be thinking that your audio files and other music play just fine on your MAC, but what about when transferring onto disk, or any other portable audio device? Have you ever wondered why WMA or AAC formats leave dead air when attempting to transfer and listen to, on portable devices? The answer is simple.