Mac OS X Finder Keyboard Shortcuts. The Mac OS X Lion Finder helps you access and organize most of the important Mac OS X functions while you work. Use Finder keyboard shortcuts to display windows, copy and move files, and launch applications. These keyboard shortcuts help you get things done more efficiently. May 02, 2009  On a Macbook, what does command H do? When I press it, it seems to make the page I am on disappear. But I can open it back up when I hit command tab. Login to reply the answers Post; Still have questions? Get your answers by asking now. Ask Question + 100. Join Yahoo Answers.

Screen Capture to disk:

Screen Capture to clipboard:

Copy and Paste

Dock /Switch Applications

Apple Finder

QuickLook

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Terminal

QuickTime Player

Spotlight

Editing Text (email, TextEdit etc)

Shutdown/Logoff:

To boot into Safe mode:

1. Shut down, and wait 10 seconds before pressing the Power Button to start up.
2. As soon as you hear the startup chime/chord, press and hold down (Shift).
3. Once the Apple logo and progress bar appear, you can release the Shift key.

To return to normal mode, restart the Mac without holding down any keys.

To Restart a system that fails a normal shutdown, open a terminal window and type:sudo shutdown -r now

Log out:

During Startup:

macOS Recovery (Restore/Repair/reinstall macOS)
At startup, press and hold one of the following key combinations:

is the Command or Apple key
is the Option or Alt key
is the Shift key
⌫ is the Backspace key

System Preferences

To disable or change any keyboard shortcuts, open System Preferences Keyboard Shortcuts
per-application settings can be added under App Shortcuts press [+]
To reset to the default settings, open Keyboard Shortcuts and press [Restore Defaults]

To enable keyboard control in dialog boxes: Keyboard Full Keyboard Access=All Controls
Full keyboard access will allow you to use Tab,Shift-Tab,Enter, Esc and the Space bar to navigate a dialogue box.

To display an on screen keyboard: System Preferences Language & Text Input sources Keyboard/Character viewer

Function Keys

F3 or Ctrl + ↑ Open Mission control / Spaces.
F8 Toggle Space.
F9 Exposé - Show all open windows.
F10 Exposé - Show all open windows for an application.
F11 Hide all windows.
F12 Open/close Dashboard.
Add to the above F.Keys for a slow-motion effect

You can discover additional keyboard shortcuts by opening a menu and pressing the ⌥ (Option) and ⇧ (Shift) keys. For example, in Finder, open the File menu and press the ⌥ (Option) key.

'Command + Tab' cycles through Applications,
'Command + ~ (tilde)' cycles through an individual Applications windows'

Related macOS comands:

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Bash Terminal Keyboard shortcuts
nvram - Manipulate or reset firmware variables.
macOS Key bindings - Remap the Home and End Keys.
HT201236 - Keyboard Shortcuts Quick Reference (Apple).
screencapture - Take Screenshots.
Applications:Utilities:Grab - Copy the screen to a TIFF file with (optional) 10 second delay.
DanRodney - macOS Keyboard Shortcuts.