Hi! Sorry, I haven't technically been able to resolve this. But I'm on a laptop and I changed it from full screen to windowed and that seemed to solve the issue for some reason. Maybe my laptop can't handle the graphics or something? I'm unsure. I tried removing the mods and I still saw the visual glitch. Nothing else is affected however, even when the glitch was happening the game was still functional.
I've merged your post into this thread on the issue. Could you go back into full screen and take a screenshot and post it here?
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/4612396/highlight/true#M162
