It works fine in Big Sur.
What do you mean it works every now and again? with your existing Sims 4 folder or the new one?
Please can you provide more information about your Mac. Instructions on how to do so and what to provide here - http://answers.ea.com/t5/The-Sims-Mac/READ-FIRST-Sims-4-Mac-Help-Guides-and-Troubleshooting/m-p/4612...
I put the folder on the desktop as described in the instructions. I fixed the game as instructed, but it still gets stuck. The game freezes at times.
So far it has been working quite normally, from 11.1. it no longer works well when I updated the OS.
January - last edited January
I downloaded the game from Origin.com.
LastCrash has been around since February 26, 2020. But at the time, the game was still working fine. The game only got stuck in early January. :-(