A Mac User's Best Friend!/PLEASE READ BEFORE POSTING ANY NEW PROBLEM THREADS!!!!!!

Hi, I'm having trouble with The Sims 3 on my mac, but I can't find a solution to the problem in the forums. Because I'm new to the forum I can't post a new thread, so I'm wondering what I can do to get help? I know I should stick to the threads topic, but I need help :( I think I might need to fix something as I've got a Macbook Pro from early 2015, but I don't know what to do or what to (potentially) install. I'm more than happy to post my Mac's description and elaborate more on the problem, but I don't want to take up too much place here :) Thanks in advance.