Hearthpwn

There was something weird when I first loaded it - I needed to restart it once or something, I don't remember. But you go to deck manager and add a new deck. Then you manually enter your decks. I'm still on OS10.10 but it works fine for me.

I use this one. Simple, works great on mac - no frills, just tracks the cards played by you and your opponent.

https://github.com/bmichotte/HSTracker