Create a new folder

Select All items

Scroll down one page

Move up one line

Move down one line

Take a screenshot

Left align

Right align

Open the Help menu

Center align

Use Quick Look to preview the selected item

Open the selected folder. This works only when in list view

Close the selected folder. This works only when in list view

Extend text selection one character to the left

Extend text selection one character to the right

Extend text selection to the nearest character at the same horizontal location on the line above

Extend text selection to the nearest character at the same horizontal location on the line below

Copy the selected item to the Clipboard. This also works for files in the Finder

Undo the previous command. You can then press Command + Shift + Z to Redo, reversing the undo command. In some apps, you can undo and redo multiple commands

Paste the contents of the Clipboard into the current document or app. This also works for files in the Finder

Save the current document

Find items in a document or open a Find window

Start a Spotlight search in the Finder window

Italicize the selected text, or turn italics on or off

Show the Get Info window for a selected file

Boldface the selected text, or turn boldfacing on or off

Select the Desktop folder from within an Open dialog or Save dialog

Duplicate the selected files

Cut the selected item and copy it to the Clipboard

Open an new document or window

Open a new Finder window

Close the front window. To close all windows of the app, press Command + Option + W.

Eject the selected disk or volume

Open the Connect to Server window

Find Again: Find the next occurrence of the item previously found. To find the previous occurrence, press Command + Shift + G

Open the selected item, or open a dialog to select a file to open

Show the original file for the selected alias

Make an alias of the selected item

Show or hide the Fonts window

Show or hide the tab bar when a single tab is open in the current Finder window

Display the Save As dialog, or duplicate the current document

View the items in the Finder window as icons

Underline the selected text, or turn underlining on or off

Print the current document

Open preferences for the front app

Open a Go to Folder window

Open the Computer window

Open the All My Files window

View the items in a Finder window as a list

Minimize the front window to the Dock. To minimize all windows of the front app, press Command + Option + M

Go to the next folder

View the items in a Finder window in columns

Quit the app

Hide or show the status bar in Finder windows

Move the insertion point to the beginning of the current line

Go to the previous folder

Move the insertion point to the end of the document

Open the selected item

Move the insertion point to the beginning of the document

Move the insertion point to the end of the current line

Open the AirDrop window

Open the desktop folder

Use Quick Look to preview the selected files

Use Quick Look to preview the files

View the items in a Finder window with Cover Flow

Add selected Finder item to the Dock (OS X Mountain Lion or earlier)

Show or hide a Finder tab

Display a window for selecting document settings

Open the Home folder of the current macOS user account

Open iCloud Drive

Hide the windows of the front app. To view the front app but hide all other apps, press Command + Option + H

Open the Documents folder

Show View Options

(on a window title) See the folders that contain the current folder

Open the Network window

Show or hide a toolbar in the app

Copy the formatting settings of the selected item to the Clipboard

Show or hide the toolbar when a single tab is open in the current Finder window

Hide or show the Sidebar in Finder windows

Create a new Smart Folder

Go to the search field

Open the Utilities folder

Select Delete or Don't Save in a dialog that contains a Delete or Don't Save button

Move the selected item to the Trash

Apply the copied style to the selected item

Move the files in the Clipboard from their original location to the current location

Show or hide the inspector window

Move the insertion point to the beginning of the previous word

Select the text between the insertion point and the beginning of the document

Open the Downloads folder

Move the insertion point to the end of the next word

Select the text between the insertion point and the end of the document

(on a disclosure triangle) Open all folders within the selected folder. This works only when in list view

Scroll to the beginning of a document

Select the text between the insertion point and the beginning of the current line

Select the text between the insertion point and the end of the current line

Find misspelled words in the document

Arrow Scroll to the end of a document

Scroll up one page

Hide or show the path bar in Finder windows

Arrow Extend text selection to the beginning of the current word, then to the beginning of the following word if pressed again

Extend text selection to the end of the current word, then to the end of the following word if pressed again

Apply the style of the surrounding content to the item pasted within that content

Delete the word to the left of the insertion point

Show or hide the Spotlight search field. To perform a Spotlight search from a Finder window, press Command + Option + Space. If you use multiple input sources to type in different languages, these shortcuts change input sources instead of showing Spotlight

Extend text selection to the beginning of the current paragraph, then to the beginning of the following paragraph if pressed again

Arrow Extend text selection to the end of the current paragraph, then to the end of the following paragraph if pressed again

Decrease the size of the selected item

Forward delete on keyboards that don't have a Forward Delete  key. Or use Control + D

Swap the character behind the insertion point with the character in front of the insertion point

(legacy) Eject internal floppy disk

Move to the beginning of the line or paragraph

Delete the character to the right of the insertion point. Or use Fn + Delete

Delete the text between the insertion point and the end of the line or paragraph

Move one character forward

Center the cursor or selection in the visible area

Take a screenshot of the entire screen

Move to the end of a line or paragraph

Move one character backward

(legacy) Eject external floppy disk

Delete the character to the left of the insertion point. Or use Delete

View a Quick Look slideshow of the selected files

Switch to the next most recently used app among your open apps

Show or hide the Dock. This often works even when you're not in the Finder

Empty the Trash

Insert a new line after the insertion point

Increase the size of the selected item. Command–Equal sign (=) performs the same function.

Arrow  Open the folder that contains the current folder in a new window

Capture a portion of the screen

Move the dragged item to another volume or location. The pointer changes while you drag the item.

Add the selected item to the sidebar (OS X Mavericks or later)

Log out of your macOS user account. You'll be asked to confirm

Open Screenshot app

Add selected Finder item to the Dock (OS X Mavericks or later)

Copy the dragged item. The pointer changes while you drag the item.

Show or hide the definition of the selected word

Open a folder in a separate tab or window

Type an Apple icon

Choose an app to force quit. Or press Command + Shift + Option + Esc and hold for 3 seconds to force just the front app to quit

Quit all apps, then restart your Mac. If any open documents have unsaved changes, you'll be asked whether you want to save them

Log out of your macOS user account immediately, without being asked to confirm

Display the Spelling and Grammar window

Open a folder in a separate window and close the current window

Empty the Trash without confirmation dialog

Make an alias of the dragged item. The pointer changes while you drag the item

Open the folder that contains the current folder.

Open Displays preferences. This works with either Brightness key

Open Mission Control preferences

Open Sound preferences. This works with any of the volume keys

Capture a window or menu