[NEW CLIENT] Champ Select Lag, Laptop Heats Up

I just downloaded the new client and played a normal.

I'm on an Early 2015 Macbook Pro

During champion select, the animations and scrolling over buttons would lag, my laptop heated up A LOT (like the fans were going crazy) and I noticed parts of the screen were twitchy too, although this is hard to get a screenshot of.

These are the only problems I've had so far but if theres any way to fix this I'd appreciate it, since I can't really go back to the old client..

I'd like to be able to be able to see all the nice new animations, that's the whole reason I downloaded the client, so if there's anything that would help I'd appreciate it