Hi @Sugar_Apple_Pie,
Go to Origin -> Right click on The Sims 4 cover -> Repair. This will repair The Sims 4 installation without having to reinstalling the whole game 🙂
I have. I feel like I've done everything and I'm lost at what to try now... I'm just about to give up. I've updated the game through origin, still same issue. I've repaired the game through origin, still same issue. I completely wiped the game from the computer and completely took every single mod and deleted it, then reinstalled the brand new version MCCC but didn't put it on the computer to see if that was the problem, then reinstalled the sims, and once I enabled the mods EXCEPT MCCC that wasn't even put on, the same error still shows up. I know its not the other mods folders too because I've taken them out one by one to see if it was something else but all it keeps showing me is the error message for the corrupted MCCC that doesn't exist at all on the computer from being completely wiped clean. I don't know what to do anymore I'm just about ready to give up on her computer at this point.
@liondreamer27 Since your sister's computer is a PC, you might try asking over in the PC section. You've established that the issue is unrelated to your mac, so there's no reason for the people over there to direct you back here. The PC experts will probably have better advice than I can offer, as what I know is limited to the basics of troubleshooting. You could create a new post explaining the problem (a screenshot of the error would be helpful) and the troubleshooting steps you've taken. Or if you prefer, you could tag Bluebellflora and ask her to split off your posts here into a new topic, which could then be moved to the PC section.
https://answers.ea.com/t5/Technical-Issues-PC/bd-p/The-Sims-4
