• SwitchResX always says a "Reboot is needed"
    Versions prior to 4.0.2 would continue to indicate that a reboot is needed to enable a resolution.
    If you already rebooted, this means the resolution was not activated at all, and can't be, because macOS refuses to activate it.
    Versions 4.0.2 and above correctly reports the status as "Invalid" or "Not activated".