How to Permanently Remove Programs From a Macbook

Locate the program you want to remove from your MacBook in your 'Applications' folder. To access your 'Applications' folder, click the Finder icon in your Dock to open a new Finder window, then click the 'Applications' folder shortcut link in the left column of the Finder window.
Drag the application icon and drop it in your Trash. Unless the program specifically came with uninstall software, moving it to the Trash is the primary method of removing it from your MacBook.
Select 'Finder' from the top menu bar of your MacBook's desktop, then select 'Secure Empty Trash.' This action permanently wipes your Trash, which means you will not be able to recover your files, even with recovery software. You can also empty your Trash to remove a program from your MacBook; it won't be visibly present, but you might be able to recover it.
Click 'OK' when prompted by your MacBook to securely empty your Trash and permanently remove the program from your MacBook. The 'Secure Empty Trash' function will take significantly more time than just emptying your Trash. Depending on the contents of your Trash, the process could take 30 minutes or more. Do not attempt to open or move items to your Trash until the 'Secure Empty Trash' function has finished.
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How Can I Remove a Program or Plug

Understand that when you install a program on your Mac, it often places files and components in multiple locations. These typically reside in the program's folder in the 'Applications' or 'Utilities' folders, but many programs also install fonts, preferences, plug-ins and other supporting files in any of the following folders: Documents and both of the Library folders. (There is a Library folder on the top level of the hard drive as well as a Library folder contained within your 'Home' folder). Folders within the 'Home' Library folder include Preferences, Application Support, Caches, Cookies, Documentation and Receipts.
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Check to see if the software package has an 'uninstall' option that allows you to simply double-click an icon to remove all traces of the software from your MacBook. Software packages with multiple components, such as Adobe Creative Suite and Microsoft Office, have an uninstaller built in. Sometimes this option is buried deep within levels of the folders in the application, and in other cases it's only available on the original installation media.
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Perform a search on your computer by selecting 'Find' from under the 'File' menu in the finder or Command-F. Configure the search parameters to search the entire computer (This Mac), the name of the software package (File Name) and the pull-down menus as 'Name' and 'Contains' and type the program name in the search field. Hit the 'Enter' key to display a list of files that contain the name of the software package.
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Drag any associated components of the software directly from the search window into the trash on the dock. Once you've trashed all the files that contain the name of the software, start a second search (using the same settings as described in Step 3) with the name of the software package manufacturer. For example, if you entered 'Suitcase' in your initial search and trashed all the files containing the name 'Suitcase,' you should repeat the process using the word 'Extensis,' as Extensis is the manufacturer of Suitcase.
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Empty the trash once you've dragged all the associated files into it. If it doesn't allow you to proceed (if the files are 'In Use' or 'locked'), then reboot your Mac. Repeat the process when the MacBook is fully rebooted. If the trash still won't empty, hold down the 'Control' key while emptying the trash.
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