Disable clamshell mode in OS X Mountain Lion

2

I am running OS X 10.8.5 with an external monitor, and whenever I close the lid of my laptop it automatically goes into clamshell mode so that all the screen contents switch to the external monitor.

When I was running OS X 10.6.8, the machine will go into sleep when I close the lid so that the external monitor goes blank.

What setting(s) should I change in 10.8.5 to bring back the 'sleep' behavior?

MLister

Posted 2014-08-16T07:51:34.840

Reputation: 165

Answers

1

Try the folllwing:

1) disconnect external monitor

2) disconnect power cable

3) run this line in Terminal: sudo nvram boot-args="iog=0x0"

4) restart

5) plug back in external monitor and power cable

Tom Brek

Posted 2014-08-16T07:51:34.840

Reputation: 146

It turns out that simply unplug the power cable before closing the lid will put the machine into sleep. Also, once it's asleep, you can plug back in the power cable, and doing so won't wake up the machine. – MLister – 2014-08-18T09:20:46.347

0

I had this issue too, and came up with this script that monitors your lid state and puts the machine to sleep when lid is closed: https://github.com/pirj/noclamshell

phil pirozhkov

Posted 2014-08-16T07:51:34.840

Reputation: 185