Please help, trying to reinstall LoL and every time it gets to around 70%, it crashes/bugsplats.

Sometime last week, right after logging in my game would crash and that went on for about 4 days. Then about 4 days ago I tried to uninstall and reinstall LoL, and now it just gets to about 70-80% everytime then crashes. It's been doing that over the course of 5 or so days and I've tried reinstalling again and again and waiting and reinstalling and restarting my computer and everything I could think of. I'm on OS X El Capitan version 10.11.2 Please help this is ticking me off so much!