Unusual Screen Flickering

Hello, I've been playing Sims 4 on mac. Ever since the update I've been getting these sporadic issues where both the EA app and Sims 4 start up, and seemingly work properly, except for the fact that as soon as they start they disappear. The only way I can get them to reappear is by clicking the EA or Sims 4 icon on my dock, but then they only show up for a second and disappear when I move my mouse, so I can't interact with the app or game. I'm at a loss of what to do, so any assistance would be appreciated. I've tested this with and without mods, so I don't think they're the issue, especially since sometimes I will start the game and it will work for a while before doing this.