Thanks for the reply. I can't post too much about the use case, other than to say it is something very bespoke and wouldn't be distributed publicly. However, I'd expect that mounting a user's entire home directory via an FSKit module is something that many people might want to do (e.g. home directory on a network file share). I can raise an enhancement request. In the meantime, any chance you could give some details on how FSKit "knows" that a particular FSKit module is enabled for a given user? I have noticed that, when I enable the module in "Login Items & Extensions", a file at "/Users//Library/Group Containers/group.com.apple.fskit.settings/enabledModules.plist" is getting updated. If I were to somehow create that file programmatically and add my module's ID to it, would that do the trick and enable my FSKit module to run before the user has logged in?