Use Finder keyboard shortcuts to display windows, copy and move files, and launch applications.
The Mac OS X Lion Finder helps you access and organize most of the important Mac OS X functions while you work. You could also probably do something kludgey by passing parameters in using environment variables. If a key combination doesn't work Cmd Command For Mac Address In Network But for older versions of Mac OS X, and because app bundles aren't designed to be passed command line arguments, the conventional mechanism is to use Apple Events for files like here for Cocoa apps or here for Carbon apps.
If your Mac is using a firmware password, you're prompted to enter the password. Option (⌥) or Alt: Start up to Startup Manager, which allows you to choose other available startup disks or volumes.
macOS Recovery installs different versions of macOS, depending on the key combination you use while starting up. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet. Command (⌘)-R: Start up from the built-in macOS Recovery system.Keep holding until the described behavior occurs. To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your Mac, or after your Mac begins to restart.