sims 4

Hello Pichanina,

Thanks for that info and for choosing the Apple Support Communities. 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.

Let's make sure that when you quit the app, it's done by following the steps here:

Quit apps on Mac - Apple Support

You may also want to check if the app is still running in the Force Quit window. If so, you can force the app to quit following these steps:

How to force an app to quit on your Mac - Apple Support

If you still encounter the message, you can figure out if the unexpected behavior is related to a user file or setting by trying to reproduce the issue from another user account. This process includes creating a new user account, logging in to it, and testing for the issue.

How to test an issue in another user account on your Mac

Next, use safe mode to start up your Mac as it does the following things:

• Verifies your startup disk and attempts to repair directory issues, if needed
• Loads only required kernel extensions
• Prevents Startup Items and Login Items from opening automatically
• Disables user-installed fonts
• Deletes font caches, kernel cache, and other system cache files

Log in to your user account and test the issue while in safe mode and then restart normally and test the issue again.

Use safe mode to isolate issues with your Mac

Graphics performance limited in macOS Recovery, safe mode, or Guest User mode

Cheers!