It is very frustrating when I try to play League of Legends on Macbook client, it takes minutes of waiting for league just to launch the launcher. Another bug I am having is that the game gets stuck at champion select forcing me to reopen league getting into the game around 1:40 which is a disadvantage for me. The game runs perfectly fine though in game except for lag and/or the random Fps drop at the last thing to kill you in the game such as Ignite, Skillshot or a basic attack. I also run league of legends on parallels on the windows version on the same Macbook and I do not have the champion select or lag issues.