ALL Mods are being flagged as corrupted. Help please!!!

Hi everyone, 

I recently got a MacBook and I went to download sims, which it downloaded and everything is good. I put my mods into my mod folder and went to open the game but it popped up that a file was corrupted, so I went and deleted the mod and tried to open my game again. Same thing happened, I deleted the "corrupted mod" and tried again. The same thing happened to me about 6 times, so I just decided to move all of the mods out of my mod folder and started up the game. I started up perfectly. I, then only placed one mod, that I knew was updated and shouldn't be corrupted into my game and boom, it pops up that the mod is corrupted again. 

How do I fix this problem, I've deleted the ea app and downloaded it again. I've deleted everything connected to the ea app and downloaded it again, and the same thing happens. I am not transferring any data from an old computer, I am not using an external hard drive. I am simply downloading mods straight from their owners and putting them into my mod folder. I am unzipping everything beforehand, I am doing everything like how I usually do and it's not working. 

I don't know if I have to do something differently because I am on a MacBook, but please help me so I can play Sims.