Mods not loading/ Saving/Crashing

When I am playing the Sims 4 game my game tends to crash out of nowhere. There is also a lot of freezing when I am trying to save my game or build a house. When I think that I have saved my game it seems to reset what I tried to save like it didn't save it at all. Also if I have the mods to a house in my folder the game would automatically replace it with something crazy and claim that I don't have a certain pack. The season pack is not loading into my game at all.  I checked and even updated my mods and redownloaded everything and I'm still having issues. I play on my Laptop MacBook Pro.