I wanted to share with you all the information I have, which is not a lot. The information box below was taken directly from the EA Gamepress website (where all the press releases/assets go).
To me this means that it is in development and that is all I know. It might just be a long term plan and we won’t hear more for ages but I hope this helps worried OSX users!
Does this mean The Sims 4 will be on the Mac for sure? No, but most likely will.
If it does, good chance it will be later than the PC release. Like with SimCity, PC was released March 2013 and Mac: August 2013.
If we hear anything more or anything changes, we will let you know as soon as possible.