Avast’s man in the middle. Published February 24th, 2015 at 12:47 PM EST, modified March 5th, 2015 at 10:28 AM EST. The security community is ablaze with news of Superfish being pre-installed on some Lenovo computers. The primary issue concerning experts is that Superfish replaced SSL certificates, used for ensuring secure connections on the internet, with its own certificates. Besides the World’s most popular antivirus for Windows, Avast is offering a comprehensive antivirus for Apple Mac OS X (Macintosh). The product is called Avast Free Mac Security 2018 (version 11) and same as the Windows version it’s completely for free.

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