Sims 4 not launching

Hi. I am relatively new to the Sims 4. I have been having this one issue over and over. I go to the EA app like normal to launch the Sims 4. I tell it to open the game, but the game will no longer launch. I contacted support about a week ago, and the person told me to move my Mods folder to my desktop. I did, and it worked. My game launched. The issue was that I had no idea my mods would no longer be in the game since I moved the mods folder out. I tried moving it back to its original spot, and the game would no longer work again. Long story short, I started out with making a new Mods folder and copying mods and cc over little by little (like 10 files at a time), and I would test to see if the game would start up. Unfortunately I had thousands of mods/cc so it was going to take forever. I ended up deleting all of my mods/cc and decided it would be easier on me to restart. Unfortunately, this issue has just occurred for a second time... the game will only work again if I move the mods folder to my desktop.. but my cc/mods will have to be transferred again. Please does anyone know how to fix this? Am I supposed to have a hard drive? Does this occur after updates? Please help. 

Note: I have a MacBook Air 10 if that helps.

Thank you.