I'm trying to change the input source from ABC to a different keyboard layout (I need to be able to choose any of them), but cannot find a way.
This iMac runs Catalina 10.15.7 has no internet connection and the user is not administrator as it is a managed iMac. I can modify stuff as administrator by I need it to persist for the rest of the users. When I try to change the Input Source through the System Preferences > Keyboard > Input Source pane, it is not saved and does not give feedback.
I did some research and found about the existence of .keylayout files, which didn't work either. I also tried using
fs_usage to register every file interaction System Preferences may have, no results either.
The only way I'm able to change the keyboard layout is through the
languagesetup command (which changes the whole system language).
Other System Preferences (eg. dark theme) are saved perfectly.
If you know how MacOS Catalina 10.15.7 handles permission at System Preferences, or why it doesn't switch input sources I'd deeply appreciate it.