Terminate CCleaner process in Activity Monitorīefore CCleaner will be uninstalled, you should load the tool out of the memory and terminate all of its running processes.Along with simple dragging your CCleaner instance into the Trash bin, several components are left on your hard drive, while to get rid of them you can only in manual mode. Unlike the uninstallation method applied in Windows via “Uninstall and change a program” form, in Mac OS the procedure is quite different. In this article I will precisely describe the step-by-step process, how to uninstall CCleaner from Mac OS entirely manually. Regarding the CCleaner, this particular program leaves a lot of libraries, settings and trash files in the system folders after installation, so you need to do some tricks in order to completely get rid of this app. In comparison with Windows, to drop a program tool from Mac OS system is not so easy and painlessly.