Depends on your priorities. WMA produces better sound, while using less storage space. On the other hand, MP3 produces poorer sound quality and takes up more storage space. This makes WMA a winner in terms of specs, but unfortunately, unlike MP3 , the WMA file format is not widely supported. Thankfully, if you have a top-notch MP3 player for Mac with various playback features and extensive audio format support, you can play both MP3 and WMA files on Mac.