This is a very simple Mac application I made called SleepyDisplay.

Click here to download it.

I made it because there is nothing that does exactly this. On the iMac, there is no easy one-click way to turn off the display but still have the computer running — and not have it locked (as the Retina iMac at least doesn’t have an eject button, and I don’t use the Mac keyboard).

So this application does that. I have only tested it on Yosemite and only on my setups — a Retina 5K iMac and late 2013 Retina MacBook Pro — so it might not work on your machine.

I do not offer any tech support and if you destroy your machine in the process of using this, it’s on you.

But for me it does exactly what I want it to.

Or as a Gnome or systemd developer would say, “Screw you if this is not the exact application for all your turning off your monitor needs. And if you don’t need it, you are mentally deficient obvs.”