system sleep in display-closed mode does not work

[rboerner]

Originally Posted by Gjonjordan23

Hi
Absolutely correct like u wrote it.
I am sorry i did not get any notifications on the response so i did not see it earlier.
Kindly,
Gjon

Thanks for the confirmation. In order to operate a Mac with the lid closed, you have to have an external power source connected to the Mac and an external keyboard and mouse connected to the Mac.

The Dell dock you are using does not provide power to the host computer. If you connect the Apple charger that Apple provided with your Mac to your Mac while connected to the dock, does that change the behavior?