[CLIENT] Load Screen goes black, cannot connect to game in progress. Mac Client.

I'm in a Mac Mini. [10.11.4]. During the last two ranked games I have been unable to connect after champ select. Sometimes the reconnect is always buggy, so I thought I lost internet connection and then was unable to reconnect. So I just waited until my game finished and tried another game. But I still could not connect in ranked after champ select. My screen just goes black and I get nothing. It even freezes my computer so I have to hard restart.

Just thought I would let y'all know.