OSX Sierra 10.13.4 Random Crashes

Ever since I (accidently) upgraded to OSX Sierra I've been having tons of problems with league. I made a post a while ago about the software mouse issue. Now my game is crashing randomly usually near the beginning. It's very frustrating because it ends up putting me behind. I've seen posts from months and years ago from people having the same issue. How has this not been fixed yet? I mean... you guys have the means to get support on a client from apple. It's not like there's no way for you to fix the bugs with Sierra. Also I sent in the crash logs multiple times, and it looks like OSX Sierra has problems with compatability with LoL.