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?

@siracusa
Does it only happen with several windows open, as shown in your demonstration video?

Regarding 3, do both users have apps/windows open? Or is it sufficient to have the other user logged in with nothing open?

Does it still happen if you start in safe mode?

Does it matter _how_ you move the windows? Like, circular motion triggers the problem, but linear motion doesn’t?