Hello,
At the moment only a PC version of The Sims 4, via Origin, has been announced. This will not be compatible with Mac. The only way to possibly play The Sims 4 on a Mac was to setup Bootcamp or a Parallels desktop with a full license of Windows 7 or 8 (however this is yet to be confirmed).
If you have anymore questions about a potential Mac version of The Sims 4, please post here:
http://answers.ea.com/t5/The-Sims-4/INFO-Sims-4-Currently-NOT-for-Mac-Ask-questions-here/m-p/2957168#U2957168
EA is currently developing the Mac version of the game, but we have no information on release dates yet.
I hope this helps and keep simming,
Cody
