'Command-T' = File Menu Add to Favorites.

'Option-Command-I' = File Menu Show Attributes Inspector.

'Option-Command-W' = File Menu Close all Windows.

'Shift-Command-N' = File Menu New Folder.

'Command-N' = File Menu New Finder window.

'Option-Command-H' = Finder Menu Hide Others.

'Option-Shift-Command-Delete' = Finder Menu Empty Trash without dialog.

'Shift-Command-Delete' = Finder Menu Empty Trash.

'Shift-Option-Command-Q' = Apple Menu Log out immediately.

'Option-Command-Up Arrow' = Open parent folder and close current window.

'Command-Left Arrow' = Collapse Folder (list view).

'Option-Command-Right Arrow' = Expand folder and nested subfolders (list view).

'Command-Right Arrow' = Expand folder (list view).

'Hold the mouse down during startup' = Eject DVD/C.

'Press Command-S during startup' = Start up in Single-User mode.

'Press Command-V during startup' = Start up in Verbose mode.'Press Shift during startup' = start up in Safe Boot mode and temporarily disable login items and non-essential kernel extension files (Mac OS X 10.2 and later).'Press T during startup' = Start up in FireWire Target Disk mode.'Press N during startup' = Attempt to start up from a compatible network server (NetBoot).'Press C during startup' = Start up from a CD that has a system folder.'Press Option-Command-Shift-Delete during startup' = Bypass primary startup volume and seek a different startup volume (such as a CD or external disk).'Press X during startup' = Force Mac OS X startup.You can go from keystrokes to action or you can look them up going from action to keystrokes. There are 2 ways you can learn the shortcuts. Here is a list of all the shortcuts in Mac OS X.

Mac desktop icons letter o p x