6.6 FPS Drop on Mac

Many other people have started pointing out this problem and I've left comments on their threads, but I realized I may as well start another one to try and get Riot to see this. In fact all of us should. The thing is, with this new patch, my frames drop to about 5 fps or lower every single time I enter a teamfight. It's fine in the base. It's fine if I'm farming by myself. But as soon as there are enemy champions, or really any other champions at all, my fps completely tanks. Considering how much of this game can be decided by one fight, I really need to be able to see what's happening in that fight. I thought it was a problem on my end, but with this many people having the same problem, there's got to be something wrong on Riot's end. Could we please get a fix for this? I can only play ARAM's (because they don't matter for anything) but even those are basically unplayable. Riot, with how many of your customers must be on Macs, this can't be something that you just leave alone. We need help.