I tried reinstalling the game, and launched from the actual cider file inside the contents folder, and worked like a dream. Thanks a lot <3

I have the same issue that person did, but it doesn't start working. When I click the cider original file, it starts briefly in the dock, the terminal comes up, but then the sims 3 disappears.

For what its worth, the text in the terminal says something about "could not retrieve the module file name (reason: 'bad module')"

Also, I doubt I have a bad download as I'm using the exact same download to run the programme on windows on my PC. It's just I have to put all the graphics on superlow as its a bad PC. I wish I could run it on my Mac :/