Game-breaking bug in patch 6.6

there's a bug that decreases fps for some macs in patch 6.6, riot hasn't acknowledged it yet though. You have to disable all in-game sounds to remedy the fps drops. it drops to 2 fps in team fights. there are numerous posts on this; it's not on the players' end. I've been playing normals instead of ranked because i lose most games since I either lose team fights or play with sounds, which means i miss audio cues.