how to clean up my mac

Click on the Apple logo located on the top left of your screen and go to: System Preferences > Storage > Manage...

clean mac, clean mac

Are the steps same for OS X Maverics aswell?

Not sure exactly what you mean by clean up your Mac.

Your Mac runs maintenance in the background for you > Mac OS X: About background maintenance tasks

Do not install any third party Mac cleaning utilities such as MacKeeper or CleanMyMac.

How to clean Apple products - Apple Support