Hi, I have been searching for a app or a solution to put the macbook to sleep by closing the lid first while connecting to an external monitor. At the moment, when I close the lid, the external monitor is still on and it is annoying because I want to just close the lid at lunch time to shut both screen. And at the end of the day I want to close the lid first to put the system to sleep and a program call Mountain will automatically unmount all my external hard drive before I unplug the USB C adapter. but at the moment, I couldn't use the program because macbook will not go to sleep when I close the lid with external monitor is plugged in. Can someone help me please!