Mac LoL is trash

I currently own a MacBook Pro 2013 and it has run smooth for the past 2 years. I have always been a huge fan of the game and fully supported every change made to the game. In the past week, particularly today, my game crashes at least once a game, completely freezing. This not only makes me reset League, it makes me have to force restart my computer, as it takes more than 5 minutes which results in 5 minute ban or longer for the following games to come. My game runs smoothly for the most part when I am in game except for this one glitch that ruins my ranked matches and the fun of a video game that I truly enjoy. I don't know if this is a result of the new Mac Yosemite software or not, but I do know that Riot should be aware of this if they aren't already. It may seem like I am the only one with this problem, however I have came across people who have this problem, they just never seem to tell Riot cause they know they won't listen. I am just announcing this to the public for others to hopefully back me up on this and hopefully get a major bug fix in the new LoL update.