My first Macbook was getting very hot and I mean very hot and I would get " performance reduced " warnings and it would start to throttle, I got a brand new replacement and it still does the same thing. This thing gets burning hot like if you put your hand underneath and keep it there you'll feel pain. I thought my first Macbook was a dud and I'm sure this one isn't and it's just the way it is because it's fanless. I'm just browsing and watching a youtube video and it gets hot and even when I'm not doing anything it still gets really really hot.