We're dealing with mostly clueless millenial "journalists" here, so cut them some slack.

He writes for TechCrunch. That normally means he also believes there are no Mac viruses (or flaws).

That computer is not connected to the internet.

DOS viruses generally didn't spread over the internet. :-)

So I guess what he has to worry about is someone handing him a sketchy floppy disk...

It's airgapped.

His writing presumably gets to the outside world somehow (last I checked). Presumably that means floppy disks, which are an attack vector.