Please run the Origin reset tool then try again.
If you play with CC/Mods, move out your Mods folder then try to launch the game.
Right click on the game in your Origin games library and select repair game.
I repaired the game through origin, uninstalled and reinstalled origin on the advice of an EA technical support person and also moved my sims folder out of my document and tried starting fresh etc nothing worked.
I actually solved the issue though by turning origin off in game. Now it seems to open normally. At least for now. If it stops again I'll try the origin reset tool. Thanks!
Great! Origin in-game is causing so many issues at the moment. I'm going to move your thread to this one - https://answers.ea.com/t5/The-Sims-Mac/Sims-4-not-opening-since-December-17-patch-Please-read-here/m-p/6614441#M11150 because it fits with the issues reported by others.
Thanks for confirming disabling Origin in-game fixed the issue 🙂
