I'm running Mountain Lion with a retina MacBook Pro with three external monitors attached. Quite often, one or more of the monitors blacks out. Normally, I would choose "detect displays" in the displays menu or system preference, but I just found that that button is no longer there. Furthermore, the displays menu is gone as well! I found it in
/System/Library/CoreServices/Menu Extras, but when I double clicked it, it didn't open.
So I guess I really have two questions:
Is the displays menu dead? Or did I break my computer somehow? I don't terribly miss it, other than the detect displays command (I never change the resolution from the default).
More importantly, how can I execute a "detect displays"? A terminal command would be fine.