Version 2.5.1 - Worked Great!
I had a .wma file to convert and decided to look on the App Store for Apple safety-reviewed programs. I bought this before I saw the negative comments, but I am assuming those comments are for the older version(s)?
I have a MacBook Pro (Retina, 15-inch, Late 2013) with 2.6 GHz Intel Core i7 and 16 GB 1600 MHz DDR3 running OS X El Capitan (10.11.1) and it converted the file just fine.
So maybe the older version(s) had problems but I think it worked great! Hope this review helps those thinking about buying this program. :-)
Kimosabi about WMA to MP3 Pro