League of Legends patch 7.9 mac's nightmare

I have report a bug a few weeks ago and this bug still effects me after 1 week. Riot has not done anything to help me improve my game. I can not play the game at all. Riot , after i join the game and picked my champ, we are suppose to be ready for the game w8ing for other players. However my screen freezes and turns white. Then freezes again and i could not join the game. Riot i would request stop improving the game play and just fix these bugs first.