Can't connect to servers? or see them for that matter....

So i got the game a few days ago it worked fine (aside for known issues) but suddenly yesterday i go to log in and no servers are popping up and when i manually do a server it gives me a connection failed warning but i cannot read the full error because its behind the screen. Has anyone had this problem? Or any ideas on what could be wrong. Im playing on a macbook pro not the best but it ran fine on lower graphic quality.