Updated February 10, 2017 Download and install QuickTime Player. Agree to the licensing terms and open. Click “File” then “Open File…” to locate your MP4 in the finder window. Select and open in QuickTime (it will open in its own player window). Click “File” then select “Export…” to bring up the “Save Exported File As…” menu. Select “Sound to AIFF” or “Sound to Wave” in the “Export:” menu bar. Click “Save” to begin the conversion process. Depending on your file’s size, this may take several minutes. Writer Bio
