"We have restored this installation to an older version of League of Legends...."

So for the past 3 days I havent been able to get on the league client at all. After the first opening saying there are patches to go thru and I press restart or allow it to restart, it dose a 0.2mb patch in 2 seconds and then this message appears: [(https://imgur.com/a/pec8q

Then its keeps restarting doing a 0.2mb patch then comes back to this message again and it repeats constantly. I dont know whats going on. My computer is a iMac 27 inch 2012. i really need your help.

Edit: So my PBE league file.... i tried patching to play a few games and found out its now my main file for league. i logged into it and its my main NA league account. so...theres that