Client, Crash

hey riot i play on a Mac and in my last match my game crashed while playing with some friends after the game crashed i tried to reopen the game it wouldn't open so i then uninstall and go to reinstall and it continues to tell me when i click on download game and play now that it cant find the server i really love the game and have played for a long time plz fix the issue i'd rather not have to stop playing and I don't have the money for a new computer could you please look into this issue