React on Rails HN RSC Demo

> "Turns out, this is part of macOS 27.0…"

Part of macOS 26.4, in fact: https://eclecticlight.co/2026/09/19/macos-tahoe-26-4-changed... "The layout of those hasn’t changed in over six years up to and including macOS Tahoe 26.3.1, but has altered in 26.4 and Golden Gate, with the addition of a new firmlinked directory pkg."

Apple doesn't do this stuff lightly. A search of WWDC sessions doesn't mention /pkg specifically, but I'd bet it's related to this: https://developer.apple.com/videos/play/wwdc2026/206/?time=6...

oefrha 2d ago

> It’s also not clear what the “pmk” in /etc/paths.d/10-pmk-global refers to.

Maybe package management kit, if we go by recent Apple naming conventions.

JdeBP 2h ago

How far Apple has come from the OpenSTEP days, when it would have been called /Package (if the guesses at are correct). (-:

torben-friis 2d ago

So they might be aiming for their own brew? Or is there some expectation for a different thing altogether?

ehnto 7h ago

It is surprising to me that in such a tightly controlled experience, they haven't attempted to displace brew already.

jmclnx 2d ago

As a NetBSD user, I would guess it is for use with pkgsrc. That would be great for mac people if my wild guess is correct.

http://pkgsrc.org/

Tomte 1d ago

As a new Mac user I could not decide between Macports and Homebrew, and I went with pkgsrc/pkgin. Cannot complain, have had zero reason to revisit that decision ever since.

duskwuff 2d ago

Does pkgsrc use the env, etc, inv, and var subdirectories of /pkg seen here?

jmclnx 1d ago

These are the directories under /usr/pkg on NetBSD based upon packages I installed. But setup depends upon OS and the person who set it up. I never heard of inv, maybe inv is a mac thing.

     bin   | include | pkgdb.refcount
     dict  | info    | pkgsrc
     etc   | lib     | qt5
     gcc12 | libdata | qt6
     gcc14 | libexec | sbin
     gcc16 | man     | share
     gnu   | pkgdb   | tests

On NetBSD /var used for logs other data. But I suppose someone could configure under 'pkg' if they wanted to,

duskwuff 1d ago

Probably not, then. The /pkg hierarchy on macOS doesn't look like that at all - there's no /pkg/bin, only /pkg/env/global/bin, where /pkg/env/global is a symlink to a subdirectory of /pkg/inv/envs.

What the heck is /pkg? (anderegg.ca)