Oh noooooo! FB12122106 still exists in macOS 14.0 (23A344)

https://mastodon.social/@siracusa/110117776662224597

https://youtu.be/h0bKmcsMFvw

I wasn’t able to reproduce it in a clean install of Sonoma, so it's obviously something related to my specific configuration. But damned if I know what it is…

FB12122106 Demonstration

YouTube

Still trying to track down this bug https://mastodon.social/@siracusa/110255326994000695

To review:

1. It happens only when more than one user is logged in.

2. It does not happen on a clean install of Sonoma—but it does happen on my actual install of Sonoma.

3. It happens even when the only two users logged in are two newly created user accounts.

4. No non-Apple KEXTs are installed.

Given all of this, I've been looking in /Library for culprits. Is there some other place I should be looking?

It can't be anything in /System because it doesn't happen on a clean install, and the sealed system volume means all /System dirs should be identical. And it can't be anything in ~/ because it happens even with newly created user accounts.
@siracusa I’d also dig into /private/var/db since that also has a lot of machine-level config state. (No clue what within that might be relevant, though, unfortunately.)