Sims 4 not loading on my MacBook Pro

I need someone's help. I have tried everything, including deleting the EA app and Sims 4 app and signing in and out of my account every time I open my games, but it gives me this error code. 

Unable to start:

The Sims™ 4 is already running.

[ed35e0ea:29f00e76:00000000:18a1dd51]