The most basic thing is to empty your Trash regularly. There are some tips to clean up your Mac.
To clean the Apple Mac hard drive is indeed necessary. While Macs don't have a reputation for crashing, they do have a reputation for getting sluggish when overloaded. Apple's Mac computers are known for being fast and user-friendly, which makes it easy to stock your Mac hard drive full of photos, music, videos, documents and random files.
