How to Uninstall Program or Application on Mac OS to really clean

Some of our current habits will uninstall an application or program in the Mac OS is by dragging it to the trash. This method is not really clean up the program / application from the hard disk moreover there are some programs that can not be uninstalled this way, the icon of the application can still be found in the Application folder. To completely uninstall a program on the Mac to the net we could delete the application, to track their application files and delete its preference files. Or more simply use the Uninstaller application for the Mac as AppCleaner, AppTrap or AppZapper which I think is quite good and free. Other applications such as CleanMyMac also very nice but you have to buy his license to be able to use it.

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