Download Hearthstone on mac from battlenet or from Itunes?

I first downloaded from battlenet and while it's downloading it tells me my Mac Air won't run the game well. So I went to Itunes and downloaded the one for Iphone/Ipad. Now I don't know if I have two versions of the same game on my Mac. If so, which one should I uninstall, are they different?

The iPad version won't run on a Mac so that'd be the one to uninstall.

Both versions are the same game, so long as you log into them with the same battle.net account.

However, if your computer is not able to run Hearthstone, then it is likely also not powerful enough to emulate an iPhone and run the game that way.

Give the game a shot, and see how it plays for you. Hearthstone's visuals can be demanding despite being a card game, but if a bit of choppiness is fine by you then you should be able to play it without other issues. It is turn-based so there are no split-second decisions that would be hampered by poor performance.