Why is your Mac making noise?
The only reason your mac would make noise is if it is cleaning
its self. If you first get a mac it might clean its-self more
often. Once the mac is comfortable in its new home it will stop
making the noise. I work at the apple store, and I can a sure you
that your computer is fine. Remember to stay calm because all macs
do make the sound, it is completely normal, and your mac will
eventually stop making the noise, once it is use to it place.