The adware/malware pop issue in MAC OS fixed,
Connection cachefld
If you still face this issue - write a comment I will help open your OSX remotely and delete the adware/malware.
It seems a lot of systems are infected with this. Its not such a big concern
Its your Apple OS warning you to remove it.
The problem is, this file has entered your OS itself via some third party app or browser extension.
Follow the steps, OSX has deep level libraries inside, do not mess with system files, they are read only as well mostly.
Look for some suspicious names and get rid of them.
Delete chrome/Firefox or any browser too. Also remove anything that is linked to them in the library.
I have easily removed it. This is not such a big issue the pop up is annoying