Take the 2-minute tour ×
Ask Different is a question and answer site for power users of Apple hardware and software. It's 100% free, no registration required.

This question Use Only External Display With Macbook asks how to use an external display with a Macbook in clamshell/closed mode with attached peripherals such as external keyboard and mouse.

I would like to know how to use a Macbook (Air or Pro), in its own right (without the use of attached external keyboard and mouse peripherals) that is attached to an external monitor.

On Windows, you can right-click the desktop and select an option to output only to an external display.

In OS X, I believe things to be slightly more complicated, therefore would like to know the precise steps needed to achieve this and indeed once finished with the external display, how to go back and use my Macbook as normal ?

share|improve this question
add comment

2 Answers

up vote 2 down vote accepted

Set the boot-args NVRAM variable to iog-0x0

sudo nvram boot-args=iog=0x0

and restart to apply the changes.

It restores the pre-10.7 clamshell mode behavior where the internal display does not turn back on after you open the lid of a laptop. The laptop will also go to sleep when you close the lid even when an external display is connected.

To undo the changes, run sudo nvram -d boot-args and restart.

share|improve this answer
add comment

OSX Mavericks completely solves this and the upgrade is free! I quite a number of hours looking for a solution :|

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.