Ruined gaming experience for mac users after the most recent update patch

After the recent update:

1. I was only getting this quarter screen (rest black) on the top-right hand side, which was really frustrating.
2. Sometimes the screen gets stuck abruptly and I can't move the screen around. I had this problem for a while.

Although I resolved 1) by changing my resolution but I can't see the minions' health bar properly and it just changes what I'm used to completely. It ruins my gaming experience because now I can't get used to calculating my damage. I hope Riot takes MAC users into account when it comes to updates.

Please please please sort out this bug (stuck screen problem). I'm using a 13-inch Macbook Pro (Late 2013).