Because they don’t know that MAC is media access control, and Mac is Macintosh.

I suspect it’s the “Mac vs PC” stereotype, and they think C stands for computer and MA stands hell knows for what. Because a PowerPC PC is not a PC, and an ARM PC is not a PC, and a SPARC PC is not a PC (OK, it’s a workstation, of the noble blood, not like the rest), and I think I’ve lost my thought.

My reaction would not be switching to MacOS, because for something the users of which look down on Linux and FreeBSD, with all that “just works” and “made for Terrans” pathos, it surely is frustrating to use.

Just some well-supported enough Linux would do.