Disconnects and Lag with Mac client since Patch

Since the latest patch I have been experiences so many disconnects. Everything goes smoothly until all champions are at 100% connected right before a match begins and which point It just drops me from the game. I try to reconnect, sometimes it works, sometimes it loads me into the game but I see nothing but a blank white screen yet can hear the game responding to my commands. Most of the time it fails to join. Other than that I have also started experiences a lot of in game lag. I looked into my computer and everything else is working correctly, its not my internet or CPU usage or anything. anyways its got to the point where I got a warning for dropping out of too many games. Hope you can fix the problem I want to get back to playing the game, especially with finals coming, its good to have something to blow off steam like playing LoL. Thanks.