Ingame problems

so, yosemite for mac came out recently and i got a bug right off the bat where the mouse icon would get stuck at the top of the screen and no matter where u tried to move it, it would get stuck there. so i went through a tedious process of restoring defaults to fix the problem, by means of quick clicking. when u didn't try to move the mouse it would stay in the positiion u wanted it in. so i had a fun 20 min trying to slide down without moving and click the restore defaults button. i hope riot fixes this problem because it became a great nuisance and i didn't get any playtime. also when i tried to restart the game it wouldn't fix the problem