You ought to be familiar with this by now, Riot. You had to "fix" this problem back around 4.18 or 4.19. Well, it's back. Can you please acknowledge us mac players on this matter and let us know you're looking into it once again?
Not just mac it happens all the time with my pc.
When the screen turns black, keep pressing space bar+enter+delete. Sounds strange, but worked for me. I couldn't tell you why it works, I just found it on another user's post. This is not a silly attempt to harm your program in anyway. I'm going to leave this message on all similar forum posts to help out as many people as possible. I hope it works for you as well. If you desire to thank me, username "ARAM is 4 fun yo". :D
