League Deletes Itself (MAC) [NEED HELP!!]

My windows computer (gaming computer) got messed up and ss being repaired right now. It's going to take a while. I tried to download League of Legends for my mac book air--more information on my mac in the video--but it just wouldn't work. After deleting, downloading, and reinstalling everything multiple times, it never seems to work. I took a quick screen record of the entire process (3 mins) of me starting the launcher and league deleting itself when I try to get into a custom game.

VIDEO LINK: https://youtu.be/Lbvrb3SBRpw

If anyone has any tips or suggestions or even fixes to my problem, I would love to hear them. Also, comment below if you have the same problem!!

Riot, I love you, please help me...

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