[CRASH] MacBook : Cannot Go Through Draft Pick

Whenever I try playing a ranked game, in the ban phase my screen freezes. In the previous patch I changed resolution because I had the top right quarter screen showing league, and the rest was black. I recently changed my resolution back to the original since the patch should have fixed that. Every time I go into a ranked game, my screen freezes. I have lost over LP, and am getting insane queue timers. Any fix? Macbook Pro user btw.