Mac OS X Shortcut

Many of these shortcuts can be customized (eg.the expose shortcuts), as explained in Customizing shortcuts below.

Shortcuts With Global Scope

More shortcuts with global scope can be found on the Universal Access page.

command-option-esc	force quit
hold command-shift-option-escape for 4 sec	Force quit front-most application (without confirmation)
control-eject	show shutdown dialog
command-option-eject	sleep now
command-shift-Q	log out
command-shift-option-Q	log out without confirmation
command-control-eject	restart
control-shift-eject	sleep displays
command-option-control-eject	shut down
command-tab	cycle between open applications
command-`	*after* having pressed command-tab, it will cycle between open applications in reverse
command-shift-tab	cycle between open applications in reverse direction
command-`	cycle between open windows in the selected application
command-shift-`	cycle between open windows in the selected application in reverse direction

control-F4	cycle between open windows in all applications
control-shift-F4	cycle between open windows in all applications in reverse direction
F8	Spaces (Leopard only)
F9	Exposé for all windows (Panther and newer)
F10	Exposé for all windows in selected application
F11	Exposé to reveal desktop
F12	Dashboard (Tiger and newer)
control-#	Jump to a space (10.5+)
control-arrow	Cycle through spaces (10.5+)
command-space	activate Spotlight (Tiger) or switch between keyboard layouts (pre-Tiger systems)
command-option-space	open a Spotlight search in a finder "Find" window
shift-volume	Change volume without sound effect
option-shift-volume	Fine-grained volume control (10.5+ ?)
option-volume	Sound Preference Pane
option-brightness	Display Preference Pane
command-decrease-brightness	Change display mode (only on revised fn keyboard layout on Alu. keyboards, newer MBP/MBs?)
opt-"Empty Trash"	Empty trash, including locked items, without any alerts
command-escape	open front row (Press any F key (except F2) or Escape to exit)
hold shift while performing action	slow down any animation (exposé, time machine, minimize, etc)
option-drag scrollbar	smooth scrolling
option-eject	Eject secondary optical media drive (if one exists)
option-click dock icon or window	Switch to application and hide previous application
command-option-click dock icon or window	Switch to application and hide all others
command-drag menulet	re-order icon
command-drag menulet off the menu bar	remove icon from menu bar