How to force Finder to quit

If the Finder is stuck, press Command-Option-Escape. Then select the Finder in the list and click Relaunch.

The Finder will restart, and should now let you restart your mac (i.e. not be stuck anymore).

If that does not work, for some reason, you may open Terminal (command-space to launch Spotlight, type Term and press enter).

In the Terminal, type

killall Finder

Hold shift and click the apple logo. There is an option that says 'force quit finder'. Click it. This should work.

Well you may have to force restart of your mac, or if that doesn’t work, shut it down by holding down the power key for 2 seconds or so.

The default for launching Siri is to *press and hold* command-space.

If you press command-space and release the keys, it should launch Spotlight; alternatively, click the Loupe at the top right of your menu bar to launch it.