Why is my league not opening on Mac?

My league on Mac is not opening since I force quit once. When I click on the icon, that icon just bounced and nothing happening. I have tried to open the Activity Monitors to see if league is actually running on the back but not. I also have had a look at the contents and tried to open the league of legends client there however league is not opening. and I have re-downloaded the league like twice and when ever I quit it and I want to re-open it, it becomes bugged and not opening any more.