So I did a six hour gig with my sx2 with Serato DJ w/ El Capitan with no issues at all. The next day, I was updating my library without any hardware connected to Serato DJ and it froze and the screen turned black which forced me to shut off my computer and it took 5 tries to get it unfrozen on the log on screen. I then tried to edit my tags on Serato DJ and it crashed and restarted my computer on itself after 10 minutes ish. I wasn't going to mess with it anymore till the screen froze and shut off my computer without Serato DJ being opened. I know the black screen is a known issue with El Captian. But my computer shutting off could be an issue or it could be just a hardware problem with my computer. Has this happened to anybody?