Trial versions of those programs are successful because they provide the instant gratification of greater free disk space.They generally operate on the flawed premise that a Mac accumulates 'junk' that needs to be routinely 'cleaned out' for optimum performance.Such products are very aggressively marketed.Never install any product that claims to 'clean up', 'speed up', 'optimize', 'boost' or 'accelerate' your Mac to 'wash' it, 'tune' it, or to make it 'shiny'. Excerpted from Effective defenses against malware and other threats: Remove it first, then follow the applicable recovery procedure below. That Mac has been affected by 'CleanMyMac' which must be removed.
