How to convert mts files to mp3 on Mac
Free download MTS to MP3 Converter Mac, run and install it on your Mac
Screenshot:
Import your mts files on Mac that you want to extract to mp3 audio files
Select your output format and output folder
If you want to join all the converted files together to make a whole mp3 audio files, you can press"Merge" button to join more files to convert to mp3 format!
You also can get a audio segment from mts video by press Edit---"Trim" button
Just click 
button to start this mts to mp3 audio conversion work.