Re: Simcity on iMac keeps closing most times i try to run it

 - I guess it's possible that your single player games are looking for the mods that were used in creating them. You can certainly try putting them back in and running it again. I would make a copy of your Games folder and put it someplace safe first, like your desktop, just in case anything happens.

I should have asked this a while ago, but what OS are you running? If you recently upgraded to Catalina, SimCity won't run any more. https://answers.ea.com/t5/SimCity-2013/Mac-SimCity-and-MacOS-Catalina/m-p/8298578#M127940