Unable to Play since New Launcher

This is what my launcher turns into ever since I got the new Riot client. I play on a Mac (Mojave) and the launcher just won't work.

I've reinstalled several times and the "Repair" tool just doesn't do anything. It just closes my game and then I have to activity monitor force quit league before I can launch it again. I've sent a support ticket but no answer.

I'm losing event pass day token grinds. Any help appreciated.