I need to execute a command-line tool to force maximum display brightness before user logs in (so login screen is shown with maximum brightness)
My problem is, if I run it from
LaunchDaemons, it doesn't work. I think it is because from
LaunchDaemons you can't run anything that interacts with the Window Server.
If I run it from
LaunchAgents, it works. But it runs after login, so it is not an option.
Is there any alternative to
LaunchDaemons to run scripts or programs that allow WindowServer access?