CAN BARELY PLAY LEAGUE SINCE PATCH, FPS STUCK AT 60, GOES DOWN DURING TEAM FIGHTS, MAC

24 hours ago, before the patch, I had constant 144 FPS, everything was fine, turn on my computer today, patch up, and get into a game, can't get more than 60 FPS, and in team fights, FPS goes down a lot, very choppy, please fix, other people are having other problems with macs as well today