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I wanted to play some retro games, I connected a ps3 controller so that i could play on a big screen. As soon as I close my MacBook pro's flap, monitor also mirrors it. I saw on youtube that a person was using the mac and he closed his flap, but everything was running fine.

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    How is the behaviour for the lid set in system preferences? – Solar Mike Aug 3 '18 at 10:03
  • Can you add a Link to video? – JBis Aug 3 '18 at 12:15
  • I didn't remember the video, but I don't have any external input device rather than a ps3 controller. – user297492 Aug 3 '18 at 16:19
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The mac has to be plugged in for it to still work with the lid closed.

If you have a USB-C power port, you may have to unplug the cord from both the MacBook and the brick, and then plug it in again. Sometimes it comes loose on one of the ends

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  • hdmi is connected, are you talking about power adapter? – user297492 Aug 4 '18 at 8:27
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    As documented, clamshell mode requires an external monitor and AC power. support.apple.com/en-us/HT201834 – Marc Wilson Aug 5 '18 at 20:08

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