[Gameplay] Strange, game-breaking, issue.

Hello, I am currently running League on a mid 2010 MacBook Pro and this issue has happened many times. What happens:

1. I enter the games loading screen
2. I get stuck at 99% for a seemingly endless time
3. I get into the game and the bug occurs.

What happens is:

1. I cannot upgrade my level 1 ability by clicking the arrow, only by CNTRL + Q,W,E
2. I cannot open shop unless I use P
3. Items from the shop are non-purchasable
4. The camera will either A; Not leave the fountain, unable to be moved whatsoever, or B; Be unable to be used in the "Locked" mode

This is a strange glitch, and I do not know what causes this. I have only met one person who has also had this problem, and they were also using a mac computer, but a different make, model, and year.