Travis A. Everett

> Incidentally I note that `_oahd` has UID 441 which makes me wonder if Apple has secretly expanded the system user range without updating the meagre documentation of it? Does...

Ok, I've reported this in FB13917314 and emailed the devrel about it. For reference, report is roughly: > ### macOS 15 Sequoia beta installer clobbering existing role users with UIDs...

> Hmmm, I ran the script from @emilazy [here](https://github.com/NixOS/nix/issues/10892#issuecomment-2349203097) (thank you, always so helpful!) Just to clarify for anyone reading this far down, there aren't multiple competing scripts here. This...

I haven't run it on an external disk, but I would imagine someone has. I don't know what this would be off the top of my head, but I guess...

Still just kinda guessing/collecting. I don't recall any ~sandbox reports like this before, but the external disk bit does remind me a little of some issues related to Nix installs...

Since we're exploring I'll try to think out loud for posterity (don't worry too much if something I say doesn't make sense; feel free to ask questions). I'll start with...

Hmm. I was thinking not, but I just double-checked the manpage for diskutil, and it says enableOwnership will: > Enable ownership of a volume. The on-root-disk Volume Database at /var/db/volinfo.database...

Drat. Does `sudo vsdbutil -c /` now report `Permissions on '/' are enabled.`? And What does `sudo vsdbutil -c /nix` report?

Hmm. Can you try the enablePermissions command for /nix as well (and reboot)? I assumed the installer would have done that, but perhaps not.

Ah. Perhaps. A complete uninstall is tricky and might be confounding. Were you on Catalina? It was working with the same general setup? It might be worth following the not-quite-released...