Can't Run Sims 3

I've been having trouble running Sims 3 on my Mac. Here are my specs:

macOS Sierra 10.12

MacBook Air (11 inch, early 2014)

1.4 GHz Intel Core i5

4 GB 1600 MHz DDR3

Intel HD Graphics 5000 1536 MB

Attached are photos of the errors I've got. I had the bug where the launcher wouldn't launch at all and managed to fix it, but now I can open the launcher and not the game. Whenever I run the game it asks for my disk code again and then says there's an error and asks if I want to debug it. I choose debug, and then it crashes immediately. Please help. I have never had this problem before on this computer, I used to be able to run it just fine. And of course EA has no idea how to help me. It took 3 hours to install, I don't want to have to do that again unless I really, really have to. ☹️ Any help greatly appreciated!

EDIT: Have not been able to run the game AT ALL, so there are no caches or mods or anything like that that could be causing this.

EDIT 2: I downloaded and installed digitally through Origin, not physical disks, so I have no idea how the hell this happened.

EDIT 3: Just tried to uninstall everything using the uninstaller, but it said there was an exception and the freaking uninstaller crashed and won't even let me remove the game! What the hell is going on??