Clam shell mode without external display, keyboard, mouse I have a latest 13 inch MBP retina, running 10.10.

I am wondering, is there a way to run the machine with the lids closed WITHOUT an external monitor, keyboard, and mouse?

We are using the machine as a server in a confined space, and would like to keep the machine closed, but still running.

Thanks
Not natively, but you can use an app like InsomniaX to prevent the device from sleeping when the lid is closed.

http://www.macupdate.com/app/mac/22211/insomniax