
Club 3D Adapter USB Type C - DisplayPort 1.4
DP, 6 cm
Club 3D Adapter USB Type C - DisplayPort 1.4
DP, 6 cm
I assume that the monitor is connected via DP. (and not from DP to HDMI) This is unusual, I must admit I have connected the adapter to the laptop to use an HP Reverb G2 and never had any problems. I will try connecting my laptop to a monitor and see if the same phenomenon occurs.
Sorry, as I don't have a MacBook, I can't answer the question. But it must be clear that the USB-C DP function is probably directly linked to the graphics card, so as soon as an external monitor is connected, the graphics card becomes active and works constantly. This is the case with many Windows laptops.