Unfortunately, this player has stopped being updated. In Big Sur, the player works very badly, constantly reports an error and quits. When you restart the player, it works, but many functions do not work correctly. And so it is constantly. It looks like the brilliant project IINA has passed its thriving and is now dying out. This is the case with all successful projects: development, thriving and extinction. This is because there are many envious, dark forces in the world that cannot calmly look at those who know how to do cool things.