Re: The Sims 4 Demo

The demo is only the CAS (Create A Sim), so you can't play the full game.
I don't think it's worth it for you to make Windows work on you Mac to only play the demo. 
I suggest saving some money and buying the game, within 24 hours you can get your money back with the online version. 
That in case you don't like the game. 
It's an expensive game, but I can tell you, it's worth it.