I'm unable to uninstall Malwarebytes from my Mac. When running uninstall from the application all that happens is the icon disappears from the top right menu. When the Mac restarts its all back again. When I run the Uninstall_MWB script I get an error saying "visudo: unable to open /etc/sudoers: No such file or directory. Any ideas or do I need another antivirus software to get rid of this one?