How to Uninstall Applications from an iMac
The Mac OS does not have a registry like Windows. The common way to “uninstall” files is to move them into the Mac trashbin. Some files for an application, though, may be spread throughout the system, making it difficult to locate them all; in the case of application bundles, for example. A couple ways are available to uninstall applications on an iMac, if you can't do so by simply using the Finder. You can use either software that came with the application, if you have it, or by downloading and installing a third-party uninstaller. If you do not want a third-party uninstaller and you do not have discs that came with the applications, then the only workable solution is to drag and drop the application into the trashbin.
Things You'll Need
Use the software that came with the application, if applicable. Some applications are direct web downloads, but if you have discs, they will generally contain a file to run to uninstall the applications.
Download a third-party uninstaller program. If you do not have software, there are uninstaller programs that can be downloaded to do it for you. Among the most popular are AppZapper and AppTrap. AppZapper you must pay for, while AppTrap is free (see "Resources").
Follow the steps when you begin the uninstaller. Read the instructions thoroughly to ensure you don't leave any files on the computer.
Find the application you want to uninstall in Finder.
Right-click on the application icon. This will bring up a menu list.
Drag and drop the icon of the application into the trashbin if it says, "Show Packet Contents" on the list. This means that the whole application is in that "package." The entire application package will be removed when you move it to the trashbin from here.