Client freezes/crashes during champion select [CLIENT][CRASH]

The client will show garbage pixels consisting of mostly white lines/boxes before freezing/crashing. It tends to crash or freeze during the ban selection. The game will start fine assuming there is some sort of random champ select for that mode or else it is counted as a queue dodge. The garbage pixels happen every game, but the freezing and crashing only occurs about 50% of the time. The client is still frozen after game completion. Running new client on Mac OS Sierra
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