Sims 3 Download Stuck at 100% (Mac)

Hi- Just want to add I'm having this same issue. I'm running a 2013 macbook air with lots of space. I have played this game before on this computer with this origin account without issue, but I uninstalled everything about a year ago and took a break. So I know the game CAN run on here, and I know the problem is new. I am convinced the problem lies with Origin and its launcher, not with the sims game. I want to add that sims4 can play normally. I'll try to be detailed so someone can tell me what else I can do.

My steps-When the game+expansions were finished downloading I was prompted to install them so I did, and after they were all done I click play and am told that there is a download in progress even though the list is empty and everything is finished and installed. I said play anyway, the game launcher pops up, I click play, I'm told to enter my registration code, I do, and it says "exception raised would you like to debug" and wether I say yes or no it quits. This is when I go to the internet for help.

Initially I tried:

-launching then quitting over and over by launching via each individual expansion pack, which each prompted me to update every time which I did.

-Changing the preferences settings for origin listed above

-changing my computer settings that were listed above

-I saw a thread on the sims3 website about changing the code for the graphics cards files

-clearing caches

-entering other peoples registration codes I got off the internet

Then I uninstalled sims3 and the expansions via the sims3uninstaller, uninstalled origin, went through all traces of the files and caches and put them in the trash and then emptied my trash, restarted my computer, redownloaded origin and the sims3 base game with NO expansion packs, and tried to launch it again and was told there was still something downloading! I opened the launcher anyway, tried to play without installing the game update, was told to enter my registration code, got the "debug" message and it quit, launched again, installed the update I was prompted to earlier, launched again, registration code, "debug" message. And then I typed this novel.

Anyone who has any insight is welcome to reply. 

@chicken422

There are various things that may help to explain Sims 3 on Macs a bit better:

1. The game is not native to macOS. Instead it is the Windows version 'wrapped' using Cider, kind of like an emulator. The game thinks it is running in Windows when it isn't. This is the root of most of the issues with the game on Macs. Sims 4 is native in macOS which is why it runs so much better.
2. The debug error is mostly likely caused by a memory issue. You need to purge RAM before you load the game, frequently during gameplay and before you save. If you've upgraded your version of macOS since last playing the chances are that the OS is now using more RAM. The game is only capable of accessing 2Gb RAM, no matter how much you have installed, and it leaks horribly.
3. You do not need Origin to actually play the game, only to install it if you're playing the digital download version. Once installed you can launch the game from within your Applications folder.
4. Uninstalling Origin and Sims 3 has to be done properly. For Origin you drag the app to the Trash then run the Origin reset tool, for Sims 3 you have to do it manually.
5. Editing the graphics card files is only necessary if your Mac is listed in this thread, or is newer.
6. Only ever update the game manually, never through the Launcher (link in my signature below)
7. Install the base game, patch, then install an EP, load the game to see if it is still working, rinse and repeat. 
8. Entering other peoples' product codes that they've stupidly posted online? Never a good idea!

DUDE What ????????