@Serenoz99 It's helped some people on Big Sur to start with a clean user folder. This doesn't mean getting rid of all your saves and other content; it's just about starting fresh and then adding back content if the game is stable.
Move your entire Sims 3 folder out of Documents > Electronic Arts and onto your desktop. When you launch the game, a clean folder will spawn with no content. Don't add anything to it yet; just see how the game runs. If you still see crashing issues, please turn down water and tree detail to the minimum settings and test again. Whenever you change a graphics setting, other than the in-game resolution or the fullscreen status, be sure to do so at the Main Menu and then quit to desktop before loading a save.
If turning down those settings doesn't help, try playing in windowed mode instead.
By the way, your graphics chip is below the minimum requirement for the 64-bit version of Sims 4. That doesn't necessarily mean you can't play, just that the game may not run all that well.
@puzzlezaddict Update: I tried a new save and attempted to add a lot in edit town and it crashed....I did add custom content back in so I'll try adding a lot without custom content.
Second Update: The game seems to crash whenever I attempt to add custom lots. It frustrating, because custom content is such a large part of the gameplay.
@Serenoz99 You might just be adding bad custom content, either an item that's corrupt or one that doesn't play well with Edit Town. Try installing just one lot into a clean folder and placing it. If it doesn't work, install one different lot and test it out. That's a good way to test whether the problem is the presence of the cc or the particular lots you're downloading.
There are plenty of problematic uploads, all the more so because lots (and worlds, and even sims) can come packaged with a good deal of cc. Sometimes it can take a few tries to find something you like that also works in-game the way it should.
When installing something that can carry other cc with it, it's always best to install it first into a clean folder and test it out. That way, if it doesn't work, you've kept it away from your main user folder and don't have to go through the process of getting rid of it or moving your other content to a new folder.
