game crashing

This is a bug and i don't know why my posts keep getting taken down I've even seen other people post about this. Ever single game on summoners rift I've noticed players including myself bugging out and having their games freeze with the disconnection popup on the screen. I've checked into it with a few people and I've noticed its happening more on Macs than Pcs if that helps with anything. it usually fixes itself by late game but for most of the game people i've crashed at least 4-5times by the 20min mark. I've lost 4games today alone because of it. this has been going on every since the last patch before that i never had this issue.