Hi! I'm looking for a way to start Calendar using a keyboard shortcut. I've already done: System Preferences > Keyboard > Shortcuts > App Shortcuts clicked "+", chose the Calendar app, added Alt-C as the shortcut . . . but it doesn't work. I'm using Firefox 55.0 (64 bit) on a Mac Mini (late 2012) running Sierra 10.12.6. Any help is much appreciated!