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Why does my macbook shut off for no reason?

Why does my macbook shut off for no reason?

I've had my Macbook laptop for almost four years now. A few months ago it started having a huge noise with the fan, so I bought one and replaced it recently. I thought this would fix the large jumps in CPU usage and fan speeds (5-6k rpm) just when I'm watching a YouTube video.

Asked by: Guest | Views: 119
Total answers/comments: 1
Guest [Entry]

"I would have to say over heating.

Try removing and reinstalling the fan, but as for the question, I am 99% sure it is overheating."