Hello, i am not very computer savvy so please be patient i recently installed the sims 3 on my new macbook pro at first it was working great but i have in the past few weeks encountered a series of what seem to be glitches my sims become frozen and i cannot switch over to a different sim also i am unable to change the active household it seems whenever i try playing with a new family these same problems occur and i know i have met all of the system requirements the game is up to date and i own all of the sims expansion packs...could it be some sort f virus? i have tried fiddling with the settings as well please help!