Traduzione in corso passo 10
10) Defrag HDD – With the help of a third party defrag utility you can can reduce or even eliminate the fragmentations present on your Mac HDD. The fragmented hard disk drive causes the OS to read and write the hard disk in a slower fashion. When the disk is defragged, the different parts of files into a single chunk of sequential memory locations.
The above activity though simple needs to be monitored with proper timing and effort. Mac users often look for a clean up Mac OSX utility that can do the job for them. Give a try to Stellar Speed up Mac utility to make your Mac go fast, even faster.