Sims 4 Not Opening Mac 2025. To resolve the issue of the sims 4 not opening on mac, follow these steps: If i understand correctly, you are unable to open the sims 4 app, as it gives an error message that the app is already running on your macbook pro.

Same thing happens if i open it directly from applications. So i just found a thread that said to move the the sims 4 folder from documents to my desktop and play, then go back and add what you need to, to the new sims 4 folder created by the.