Shortcut to shutdown on the new Macbook Pro Touch Bar running High Sierra?

Turn on, restart, sleep, and shut down

Press Touch ID to turn on your MacBook Pro if it's open and turned off. If your MacBook Pro is closed and turned off, simply open it to turn it on.

Unlike with older Mac notebooks, holding down Touch ID on your MacBook Pro doesn't display a dialog with options to Sleep, Restart, or Shut Down. You can find these options in the Apple menu. If your MacBook Pro is unresponsive, you can hold down Touch ID for six seconds to force a shut down. Note that you'll lose any unsaved work if you do this.

Pressing Touch ID won’t put your MacBook Pro to sleep. Instead, choose Apple menu > Sleep. You can also add a Sleep button to the Control Strip in the Touch Bar:

1. Select View > Customize Touch Bar.
2. Touch the Control Strip region of the Touch Bar to switch to Control Strip customization.
3. Use your cursor to drag items that you want, such as the Sleep button, from the main display down into the Touch Bar. You can also drag items left and right within the Touch Bar to rearrange them, or drag them up and out of the Touch Bar to remove them.
4. Tap Done in the Touch Bar or click Done on the screen when you finish.

https://support.apple.com/en-us/HT207054

Try: holding down the Control-Option-Command keys while momentarily pressing the Power Button.

That's how's it's done on 12" Retina MacBooks (they don't have an Eject key), might work the same way on your MacBook Pro.

From: https://support.apple.com/en-us/HT201236

Macbook Pro with Touch Bar

The shortcut you mentioned no longer works.

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.

https://support.apple.com/en-us/HT201150

It is possible, but involves an AppleScript and Automator.

1 Launch Automator and follow the instructions from Monomeeth here: https://apple.stackexchange.com/questions/175215/how-do-i-assign-a-keyboard-shor tcut-to-an-applescript-i-wrote

2 Paste the script between (* Your script goes here *)

display dialog “Your mac will shut down in 6 seconds!” with title “shut down” giving up after 6

tell application “System Events” to set quitapps to name of every application process whose visible is true and name is not “Finder”

repeat with closeall in quitapps

quit application closeall

end repeat

tell application “Finder”

shut down

end tell

Once you've saved your service as something meaningful, assign a keyboard shortcut. I used Command Alt 0 so as not to conflict with built in shortcuts.

Hope this helps

Mike

Unlike with older Mac notebooks, holding down Touch ID on your MacBook Pro doesn't display a dialog with options to Sleep, Restart, or Shut Down. You can find these options in the Apple menu.

A new Mac comes with 90 days of free tech support from AppleCare.

Please call AppleCare

AppleCare: 1-800-275-2273 or contact Apple. Contact Apple Support.

Move the mouse pointer to the  in the menubar.

Click  menu.

Choose Sleep, Restart or Shutdown.

Macbook pro with Touch Bar

Yes I read the question. There are no shortcuts.

Apple specifically says it. I posted links to relevant articles.

Best.