Gmod not joining MP games

My Gmod has been having issues lately. I run Gmod on an Imac with up to date software and what not. Now whenever I try to join a multiplayer game, no matter the type, it loads about 65%, says it’s retrieving the server info, and stops responding and crashes. Without fail 100%. I’ve tried everything I could think of. I waited a day, I uninstalled, I even tried joining a singleplayer game first. None works. It use to work fine. At one point the game wouldn’t even start but reinstalling fixed that one. 5% of the time it works, but now it never works.