If you're wondering how to do the equivalent of a PC's "Control+Alt+Delete" function on a Mac, here's how you can force quit ...
These are the best keyboard shortcuts to play music, find things in your music library, and to manage playback. Spacebar (Mac) or Ctrl-Spacebar (Windows): Play or pause the selected song.
It's possible to close all the windows on your Mac computer in Safari with a keyboard shortcut or the top toolbar. Here's how to do it.