I hat a CTO 16gb ram base model mid 2012 retina macbook pro and my fans were kicking on randomly after I did the recent update and it felt like something was loose in my laptop. I took it to the store and the genius wanted to replace the full machine. Since it was CTO they had to order one for me. I assume it will be a 2013 model they replace it with. Has this happened to anyone else? I am worried my new one will be plagued with more issues.