Here is a list of useful time saving keyboard shortcut's for your Mac. These keyboard shortcuts for Mac OS X will save you time on your day-to-day tasks. They are for all versions of Mac OS X including 10.7 Lion.

General Application Shortcuts

Command  Tab = Switch between applications
Command  H = Hide application
Command  Q = Quit application
Command  S = Save
Command  Option  S = Save As
Command  O = Open
Command  X = Cut
Command  C = Copy
Command  V = Paste
Command  A = Select All
Command  Z = Undo
Command  Shift  Z = Redo
Command P = Print



Screenshot Shortcuts

Command Shift 3 = Capture screenshot of desktop to image file
Command Shift 4 = Capture selection of desktop to image file
Command Shift Spacebar 4 = Capture window to image file
Command Shift Control 3 = Capture screenshot of desktop to clipboard
Command Shift Control 4 = Capture selection of desktop to clipboard
Command Shift Control Spacebar 4 = Capture window to clipboard



Apple Finder and General Shortcuts

Command N = New finder window
Command W = Close selected window
Command Option W = Close all windows on desktop
Command F = Search
Command Control N = New Folder
Command L = Make alias of selected application
Command I = Show info of selected file
Command E = Eject media
Command Shift H = Open home folder
Command Shift A = Open applications folder
Command Shift U = Open utilities folder
Command Shift Delete = Empty trash
Command Delete = Move selected file to trash
Command Option D = Show & hide dock
Command Spacebar = Open & close Spotlight
Command Option Spacebar = Open Spotlight in window

System Shortcuts

Control Eject = Shutdown menu
Command Control Eject = Restart computer
Command Option Control Eject = Shutdown computer
Command Option Shift Esc (hold for 3 seconds) = Force quit current application
Command Option Esc = Force quit menu
Control Shift Eject = Put display on sleep mode
Command Option Eject = Put computer on sleep mode