Using hard power down (holding power button for 10 seconds) my Mac will not shut down.
Pressing any random keys afterward will wake it up (so it was just in some kind of sleep mode)
Will resetting the T2 chip fix that.
MacBook Pro with Retina display, macOS Mojave (10.14)
Turn off (shut down) your Mac
The best way to shut down your Mac is to choose Shut Down from the Apple () menu.
Just as your Mac follows a startup process after it turns on, it follows a shutdown process before it turns off. That process includes automatically quitting all open apps and logging out of your macOS user account.
If your Mac doesn't shut down, try Force Quit to close any apps that aren't responding. If that doesn't work, press and hold the power button until the Mac turns off.
How to reset the T2 chip
