If I hook up an NEC monitor as an external display- how do I get the monitor on my IMac to shut itself off - without me shutting the entire computer off
I will be using the NEC as my new display and there is no need to have the iMac running as it sits behind the new display where I can't see it anyway
Afaik, Apple has never made this possible. You can disconnect the display internally (and permanently), but there is no solution built into OS X that will dim or extinguish the iMac display while keeping the external monitor going. Some recommend using the utility Shades. Don't know anything about it.