A clean installation of OS X Mavericks takes about 35-45 minutes to complete, depending on the speed of the install drive and the volume OS X is being installed onto. You can even configure your hard disk so that it operate at the best levels. This software performs a number of cleanup and maintenance functions that allows you to create more space on your machine.
OnyX mavericks is a cleanup utility for mac computers that monitors and allows you to check the condition of your mac.