From its beginning, the Macintosh has been a mouse based OS. This is no more apparent today than in iOS and Mac’s gesture controls. That doesn’t mean that I always want to reach for my trackpad when I want to do something other than typing. Fortunately, Mac has a wide array of keyboard shortcuts, which I’m going to try to cover. NOTE: This list is not necessarily comprehensive, though I will try to be. What I basically mean is that I’ll cover the shortcuts for specific, Mac-centric apps (e.g. Finder), a few application agnostic commands, and some that may be general across similar apps (like browsers). Just don’t expect to find every keyboard shortcut under the Apple-logo sun to be in this list. Enough of that, let’s get to the commands. NOTE: Unless otherwise stated, a dash is not part of the keyboard shortcut.
GENERAL: Shortcuts you’ll find across the board.
- Zoom In: Command – (command key, minus symbol)
- Zoom Out: Command + (command key, plus symbol)
- Cut: Command-X
- Copy: Command-C
- Paste: Command-V
- New folder or document: Command-N
- Open file: Command-O
- Save page/file: Command-S
- Save As: Command-Shift-S
- Find folder,word in page: Command-F
- Print: Command-P
- Select All: Command-A
- Undo: Command-Z
- Redo: Command-Shift-Z (on rare occasions, the command is Command-Y
- Quit an app: Command-Q
- Close a window/tab: Command-W
- Hide window: Command-H
- Minimize window: Command-M
- Activate Spotlight: Command-Spacebar
- Quick app switching: Command-Tab
- Bold Text: Command-B
- Italics: Command-I
- Underline: Command-U
- Reload Page: Command-R
- New tab: Command-T
- Back: Command-(Left arrow)
- Forward: Command-(right arrow)
- Reopen closed tab: Command-Shift-T
- Make a new Finder Tab: Command-T
- Connect to Server: Command-K
- Get info on selected folder: Command-I
- Quick view of folder you’re in: Command-Y
- Open folder: Command-(down button)
- Open enclosing folder: Command-(up arrow)
- Back: Command-[
- Forward: Command-]
- Change Finder view: Command-(the number 1, 2, 3, or 4)
- Make duplicate: Command-L
- Delete file: Command-Shift-Delete
- Zoom in/out on a page or folder: Command+ or Command- respectively.
- Zoom in and follow arrow: Option-(two finger scroll up). NOTE: For OSX Lion or higher, this is the same whether or not you have “natural scrolling” enabled.
- Turn your screen to a negative image: Command-Option-Control-8.
- Turn volume up or down without the “pop” sound: Hold Shift while pressing volume up or down key.
- Smaller adjustments to sound and screen brightness: Hold Shift & Option while moving the screen/keyboard brightness, or volume keys. NOTE: This does not work in OSX Lion or higher.
EasyOSX 
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