@Realjas When you try to launch the game, is Origin running? If so, close it, restart your computer (keep Origin closed), and launch TS3 through the icon in Applications.
If that doesn't help, or if you've already taken Origin out of the picture, you may need to edit the game's .sgr files. Luckily, someone has already written out instructions for your card. Please read them carefully and then make the appropriate edits to both graphicscards.sgr and graphicsrules.sgr.
https://bluebellflora.com/2018/07/24/sims-3-mac-players-i-need-your-help/#Filesready
And if this does work, please let us know. Bluebellflora still needs confirmation that the edits for your card are effective. If you still can't launch the game, please tell us as well; any feedback is always appreciated.
Once again, I would like to thank you for taking the time to help, BUT...
It didn't work. I went back and made sure I followed the steps precisely, too.
I looked to see if it perchance created the DeviceConfig.log before crashing and no. There is no log or The Sims 3 folder in my Documents/Electronic Arts.
