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archdelux
Oct 14, 2012, 10:42 AM
I use my MacBook pro With an external display so that I have dual monitors. After upgrading to mountain lion from snow leopard, when I close the lid of my computer, it doesn't sleep but goes into clamshell mode. How do I change this?

Thanks



archdelux
Oct 14, 2012, 11:09 AM
I had high hopes for this fix, but it didn't work: https://blog.tuinslak.org/mac-os-mountain-lion-external-display-sleep-when-closing-the-lid

colloc
Oct 14, 2012, 11:22 AM
I use my MacBook pro With an external display so that I have dual monitors. After upgrading to mountain lion from snow leopard, when I close the lid of my computer, it doesn't sleep but goes into clamshell mode. How do I change this?

Thanks

Have you tried turning off your external display before closing your Macbook lid?

switon
Oct 14, 2012, 11:23 AM
Hi archdelux,

Clamshell mode is considered a feature by Apple...so if you want to sleep your AC powered and external monitored MBP, you either leave it open, click the Apple menu icon, and select Sleep, or you can close it, wait for the external monitor to reawaken, click the Apple menu icon, and select Sleep.

As you state, the nvram trick appears to work on only certain MBPs but not all. Perhaps someone else has found a final "fix"?

Switon

archdelux
Oct 14, 2012, 11:24 AM
Have you tried turning off your external display before closing your Macbook lid?

well, that would work (as would putting the computer to sleep before shutting the lid), but I want to change the system to accomodate my needs, not the other way around.. It seems that there could be an easy fix to just get the external display to work as it did in snow leopard..