For years, the myth has prevailed on computers with a functional Mac ή Linux It is difficult for infection to occur and how the systems with the highest infection rates are those of Windows.
We will not disagree, but we will only agree on the percentages. Obviously, the operating systems with the highest infection rates are those of Microsoft, since they are also the most dangerousdata worldwide, so that's where the "hits" are concentrated. 
These days, however, are increasing users which in a Mac environment stick to the known for years from Windows, Adwares, the browser's advertising add-ons.
First step
The first thing we notice when our computer is infected by adwares is the unauthorized opening of pages with various advertisements etc .;
First the user must perform a scan with the following program.
It is the equivalent of AdwCleaner for Windows. These programs will scan our system and clean up any known adware that affects your browsers.
Second step
Install and scan the system with one of the following free antivirus for Mac.
There are also paid security solutions for anyone who wants it, like Kaspersky and Eset.
Third step
Shielding tourists with the familiar to all of us Adblock.
Here you will find it additional of Adblock for Apple's browser Safari, for Chrome and for Firefox.
Tips for protecting Windows systems from the following link:
