man it's happened for years. I've always played on Macbook, sometimes it crashes on startup, sometimes it just hangs for a while and other times it just crashes and shuts down. I made a complaint about it years ago on my old Macbook but was met with the usual "get a pc bro" responses. I took a 3 year break, now I have a new Macbook yet all of those problems still occur. It's the main reason I never do bossing, the other day it crashes during my first Seiryu attempt, I was 25 minutes in and had to start the whole thing over. It makes any non afk-combat so risky.