The 3.10.4 Improvements as written above are poorly worded English. I note that they are the same as here:
The first bullet point should read:
Avira Antivirus for Mac 3.10.4 is compatible with macOS 10.14 "Mojave."
The second bullet point should read:
Installation on macOS10.14 (or later) has an extended setup process, which requires administrator permissions. (Right? If not, please define "user permissions." And how do you know that "later" installations will also require extended setup.?They haven't even been released in beta.)
The third bullet point is incomprehensible. I'm going to guess that what you mean to say is,
"If Avira Antivirus for Mac is already installed on a computer that is being upgraded to macOS 10.14 "Mojave," the first time the program is run (after the macOS upgrade) the user will be asked to supply the administrator password.
Dear MacUpdate: Please change "Will Avira Antivirus work good on macOS 10.13.4?" to "Will Avira Antivirus work well on macOS 10.13.4?" "Good" is not an adverb, it's an adjective. German companies are excused for occasional improper English. You are not.
I'll just add a note here to thank all the reviewers. The more detail you can provide the better. There are so many entries in the Mac AV "space, it's almost impossible to sort through them all. Feels like a minefield.
ClamXAV 3 works well for me, and though it isn't free, I've used it for over a decade and am happy to support Mark Allan. I don't use the "real time" feature.
Intego Virus Scanner also seems to work well, is free, and has no real time feature.
Malwarebytes for Mac seems fine as far as it goes (trapping existing infections of common malware) but does it do anything beyond that? The marketing hype is insufferable. ("Crushes the threat of Mac malware!")
Avira seems like it's OK, but the lack of recent positive reviews makes me wary. Ah uh, heh, I *always* want to know if these programs have an installer that actually uninstalls everything.