Pro Audio Converter

Five stars through Yosemite, but crashes immediately upon launch when I try to use it with the El Capitan previews. I assume that the author is working to correct that.

UPDATE:

The author has assured me that he will have an updated version of PAC ready for the final release of El Capitan. Meanwhile, he has provided me with a copy of PAC v1.8.1b which does, in fact, work the OS X v10.11.1 EC golden master.

Senissimus about Pro Audio Converter