Here are some lesser known OS X shortcuts to help you become a keyboard ninja.
Fn-Deletedeletes one character to the right of the cursor, same as forward-delete on a PC.
Ctrl-F2moves focus to the Menubar.
you’re free to use the arrow keys to select menu items and enter to apply them.
Ctrl-F3moves focus to the Dock.
Ctrl-Cmd-Ddisplays a popup dictionary for a selected word.
Just hover over the word with the cursor and hit the shortcut.
Useful for quick definitions.
Cmd-Qquits the current software.
Opt-Cmd-Escapeopens the force quit menu where you’ve got the option to selectively force quit applications.
Holding Shift-Cmd-Opt-Esc for three secondsforce quits the frontmost tool (Leopard and Snow Leopard only).
Ctrl-Ejectopens the shutdown/restart/sleep dialogue.
Ctrl-Shift-Ejectputs the display to sleep immediately.
Opt-Cmd-Ejectputs the computer to sleep immediately.
Ctrl-Opt-Cmd-Ejectshuts down the computer immediately.
Finder Shortcuts
Enterrenames selected file.
Cmd-Oopens the selected folder in the Finder.
Shift-Cmd-Ncreates a new folder in the current directory.
Cmd-Iopens the Get Info panel for the selected item.
Cmd-Deletesends selected file(s) to Trash.
Shift-Cmd-Deleteempties the Trash with confirmation.
Shift-Opt-Cmd-Deleteempties the Trash without confirmation.
