I've recently had to reinstall macOS and I haven't yet installed any antivirus; for the past few years I've been using the free version of Avast!, which has been fine, but I've never been completely comfortable with the invasive way that it operates (requiring root permission to inject itself into a bunch of places), and found I ended up disabling a lot of its features anyway. All I'm really looking for is something that can scan files arriving in my ~/Downloads folder, and also lets me scan other files on demand. I'm looking for something that doesn't require root permissions except when absolutely necessary, i.e- if I want to a run an on-demand scan of my entire system. I don't mind running one process per user account, so long as all it's doing is waiting for changes to some folder(s) I specify, i.e- nice and lightweight. I seem to recall that ClamXav used to be an option, but it appears to be a paid-only product now, despite just being a wrapper around the open-source ClamAV. Are there any other free ClamAV based alternatives?