How to Clean Up Your MacBook System

Launch your disk inventory utility (Disk Inventory X, GrandPerspective or WhatSize -- all are freeware or shareware) to see a visualization of the files taking up space on your computer. Every bit of information on your drive is color-coded in this visualization. For instance, if you have a large music collection on your hard drive, these files will be indicated by large blocks of a solid color. Examining what takes up the most space on your drive can help you locate misplaced or unwanted files and determine what files can be moved to an external drive.
Connect a USB or Firewire external hard drive to your computer. Locate document and media files that you do not frequently use on the computer. Photos, music and videos are ideal candidates to store on an external hard drive. These files can be accessed anytime the drive is connected. Do not copy system or program files. For example, computer games may take up a large amount of space on your hard drive, but these files would need to be physically installed on the drive. Even then, running the game from the external drive would significantly decrease performance speeds.
Organize your system folders, primarily the Downloads and Documents folders. Click the asterisk button in the Finder window to create new subfolders and assign easily remembered titles to them. Drag and drop files into these new folders instead of storing a mixed bag of media in your Downloads folder. Many files downloaded from the Internet are automatically copied from the browser to your Downloads folder, however, so you may have a picture or an email attachment that was stored on your drive even though you only viewed it the first time you opened it. By default, the Mac operating system keeps your important system files together in a separate folder away from your personal and regularly accessed media. Do not try to copy and relocate system files.
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