@belleessie I don't think the game actually installed anything, that is if your Mac is running Catalina. The installer is also 32-bit, so it wouldn't have run. I'm guessing the extra storage is from Origin's download cache, which you can clear just by running the Origin reset tool:
https://help.ea.com/en-us/help/origin/origin/how-to-reset-origin-on-mac/
If you want to double-check that there are no Sims 3 files on your computer (there really shouldn't be, but maybe you'd like to look), this uninstall guide lists everything you'd find if the game were in fact installed:
https://bluebellflora.com/how-to-do-a-clean-uninstall-and-reinstall-on-a-mac/
I don't think my Mac is running Catalina - it currently says it is still Sierra (10.12.6) even though I thought I had fully updated the laptop a few days ago. But I just tried resetting and re-downloading Origin and it worked! My storage is back up to (nearly) what it was before I tried installing TS3. Thank you so much for helping. Hope you have a good day!
@belleessie That's great to hear. By the way, the minimum requirement for the 64-bit version of Sims 3 is High Sierra, although I don't know whether that means it won't run on Sierra at all or just won't run well. So if you're looking forward to the update, you may want to plan to install at least HS, if not Mojave. You can see the full list of minimum and recommended requirements here:
