The Sims 3 64-Bit Keeps Crashing on Mac

1qotcb37p81g​  Okay, so your Mac is above the game's minimum requirements, but the specific graphics chip has had issues running this version of Sims 3.  That doesn't mean you can't play, at least not necessarily, but I do want to mention that other players on this hardware have had unsolvable graphics issues that don't cause crashes but do affect their enjoyment of the game.

Anyway, try playing with your computer offline.  You can sign into the EA App and put it in offline mode, then disable wifi before pressing Play.

If that doesn't help, please test in a new user account on your Mac.  Create a new admin account, don't link it to your Apple ID (you can skip that step), open the EA App, sign into your usual EA account, repair the game (again, if you have already), and see whether you can play.  You'll likely need to be online the first time, but if you get another crash, you can go offline in the new account and see whether that helps.