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MBA with lid closed connected to monitor through thunderbolt goes to sleep when power cord is removed

Hi , My MBA 2012 goes connected to external monitor through the thunderbolt port goes to sleep when the power cord is removed any idea how to avoid this ? Below are some additional details


  1. It has a new battery so not battery issue.
  2. Sleep timer set to 60 minutes in energy saver.
  3. It doesn't go to sleep when lid is not closed and power adapter is removed only does it when lid is closed and power adapter is removed.

Posted on Dec 15, 2020 4:24 PM

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Posted on Dec 15, 2020 7:02 PM

That model Mac is demonstrating correct behavior.


Use your Mac notebook computer in closed-display mode with an external display - Apple Support

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MBA with lid closed connected to monitor through thunderbolt goes to sleep when power cord is removed

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