The silly thing is there's already a comment under the question that links to the OSX answer.
Is that a problem too?
I usually have no problem with the odd related comments popping up. Comments are displayed as second class citizens, they're small and unobtrusive... That is until they descend into open meta quibbles (so thank you for moving the conversation here).
"How can you say that?"
"This it Ask Ubuntu!"
"OSX is proprietary rubbish!"
"Down with the system!1"
Well sure, but in absolute terms this little comment was doing us an extraordinarily small amount of harm and was making SE (and the internet) a better place. Maybe I'm just reaching a particularly lazy phase of life but I would argue for a little utilitarianism, especially when the trade-off is currently so small.
If you think this is a slippery slope and we're going to get a flurry of Nintendo Game Boy users telling us how they do things in LibreOffice, perhaps we can address that then, but I see no evidence of that yet.
2 comments will not tip this ship.
On "technically correct", "potential harm" and "precedent"...
Rightly, Meta posts often discuss the future ramifications of their subject.
I've flippantly addressed this above because I feel that slippery slope or not, we're not talking about Everest here. Two or three comments a year that help people either navigate to the right place or just outright help them is worth it IMO.
But precedent isn't that important. We aren't writing an immutable constitution or issuing a supreme court edict here on Meta. If this becomes an actual problem, I have no problem changing the rules then to deal with it at that time. If that means shutting down somebody who says "but in 2016 Oli said I could post Game Boy cheat codes everywhere", that's okay.
s/OSX/OSn/glet's make the question a bit more abstract.