If you’re searching for a free security suite to protect your Mac, Avira Free Antivirus 2018 for Mac OS is the default choice. The suite it offers with no fee covers all the basic needs. It features a malware scanner, an online behavior protector and some other features, as basic as necessary.
The suite detects the malware by its behavior, besides traditional signature bases. This approach is much more intelligent and progressive, so it increases the percentage of malware neutralized. The bases are nevertheless an important part of security, so they get constant updates.
The free suite comes short of features you may need sometimes. It cannot scan USB media unless you upgrade to Pro version. As well it offers no browser extensions, though these can be downloaded for free from within the browser.
It does the scanning quickly, but the impact on system productivity is significant, both with active scanning or background running. If you’re ready to put up with that (for zero fee), or you use a powerful and fresh computer that can handle this, than Avira is a candidate you should consider seriously. And If you’re missing pro features, you can easily upgrade.