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There is no reason to ever install or run any 3rd party "cleaning", "optimizing", "speed-up", anti-virus, VPN or security apps on your Mac.  This user tip describes what you need to know and do in order to protect your Mac: Effective defenses against malware and other threats - Apple Community   

To remove adware download and run the free version of Malwarebytes. It was developed by a long time contributor to these forums and a highly respected member of the computer security community. 

To find files that Spotlight can't located use the shareware Find Any File.

FAF can search areas that Spotlight can't like invisible folders, system folders and packages.  

BECAUSE you installed a piece of **** called "cleanmymac"!!!!

This is worse than the supposed malware you were trying to get at.

This program is a cancer.

You will most likely need to do a clean install in order to restore sanity to your mac.

NEVER install any program that claims to "clean", "speed up" or "optimize" your mac. They're scams.