[CRASH] Patch 5.15 Scoreboard crash

I keep getting a crash when I hit "O" to open scoreboard. Everything turns into flashing pixels like the 5.14 crash. Has happened on all maps. More consistently on the Bilgewater ARAM map. If I tab out of league of legends my screen still flickers and it usually crashes the whole computer. I'm on an intel mac running up to speed until last two patches and it seems related to the initial problem with 5.14.