One thing you dislike about seasons?...

So my game is severely lagging. I have no idea where to post so figured here could work. I'm playing on a Mac Book Pro, I have quite a few expansions and stuff packs added, this issue started out of no where. I uninstalled the game and then re-installed it and it's still the same issue. I tried to put the game in "laptop" mode but I was unable to even click the button, so it's not just in-game lagging, it's even in the main menu. Now that the game is closed, my computer is back to normal, I'm really not sure what the issue could be? Maybe not enough memory available on my laptop? I didn't have this issue until about a month ago or so. Any help would be appreciated, thanks so much!