Is your Mac getting sluggish? Does it seem to take forever to do what used to happen much more quickly? Have you upgraded your system a few times since you purchased it?
I have been hearing about a new program called Clean Your Mac. That really seems to solve the above issues. You can find it at:
You might want to give this a try.
I have not tried this myself because my daughter did a great job cleaning my Mac before she gave it to me. Yes, I have reached the age where I am getting second hand computers from my daughter and I am lucky to have a daughter who likes the best of everything when it comes to technology.