Sononym - Machine-Learning Powered Sample Browser
Short introduction video on youtube
https://www.youtube.com/watch?v=VfKin1n_YaA
"Serious about using samples for music production or sound design"
It does 100% automatic tagging/categorization of your sounds, and works completely offline too.
It can even find samples from a recording that you've just made (using sound to find sound - a.k.a. similarity search).
Works with OS X 10.9 or newer, free trial available from the website:
https://www.sononym.net/