This is not about using Dark Mode, but FCPX and Motion. Like many professional post-production apps, the interface is extremely dark and low in contrast in order to view your footage more clearly (among other reasons). FCPX and Motion do not have an option to change the low contrast interface. So, when a student has set their brightness all the way down, they can barely see anything. I hear it constantly, "I didn't see it there" when I come by, turn the brightness back up and show them where the tool or menu item is.
This isn't about locking the screen brightness at 100%, it's about keeping the students from turning it so far down that they can't tell what they're looking at.
It befuddles me that there isn't a way to lock certain aspects; brightness, mouse setup, desktop picture (which I use as a way to tell which user account the students are logged in as), etc just in terms of keeping track of settings that are more about making the user experience as simple as possible, not about absolute control over the individual.n But it looks as though this is impossible.