Mac shortcut keys

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In System Preferences > Hardware > Keyboard > Keyboard shortcuts, you can view and set all of the shortcut key combinations that are currently set.

MacBook's keyboard layout does not have a separate home/end/pageup/pagedown four keys, with the fn+ arrow key substitution:

Fn + Left Home
Fn + Right En
Fn+up PageUp
Fn + down PageDown

There is also only Delete in the MacBook's keyboard layout, and there is no separate del (Forward Delete):

Fn + Delete Delete (Forward delete)
Command + Delete delete file
SHIFT + COMMAND + DELETE Clear Sky Recycle Bin

Application-wide shortcuts (in almost all programs, these shortcuts are the same function, so it's important to spend some time remembering them for future productivity):

Command + W closes the current window (in a Multi-tab program, such as Safari, which is equivalent to closing the current tab) (Close window)
COMMAND + q Close the current program (quit)
COMMAND + M minimizes the current window (program) (hidden) (Minimize)

Command + a all selection (select All)
COMMAND + C copy selection (copy)
COMMAND + x cut selection (cut)
Command + v paste to selected position (paste)
COMMAND + z undo action (undo)
SHIFT + COMMAND + z recovery operation (Redo)

COMMAND + o on (open)
COMMAND + N newly created (new)
COMMAND + S Save (Save)
SHIFT + COMMAND + S Save As (Save As)

Command + P printing (print)
SHIFT + COMMAND + P Page Setup (Page Setup)

Shift+command +/ Help menu

Command + ' preferences

When editing text:

Command + Delete Delete to the beginning of the line
option + Delete Deletes a previous word
fn + Delete character after deletion of cursor
fn + OPTION + Delete a word after deleting the cursor

SHIFT + up selects all content before the cursor
SHIFT + down selects all content after the cursor
SHIFT + left selects the contents of the cursor forward to the beginning of the line
SHIFT + right selects the cursor backwards to the end of the line

COMMAND + up cursor moves to document header
COMMAND + down cursor moves to the end of the document
COMMAND + left cursor moves to the beginning of the line
COMMAND + right cursor moves to the end of the line

OPTION + Keyboard special characters

Command + TAB / SHIFT + COMMAND + TAB Switch application (equivalent to four strokes on the touch pad)

MacBook's f1~f12 are defined as various function keys, such as adjusting screen brightness, volume size, and so on. However, some people may want to change the system settings according to their past habits:

Use all F1, F2, etc. keys as standard function keys
When this option was selected, press the Fn key to use the special features printed on each key

Common system-level shortcut keys:

OPTION + COMMAND + ESC Force quit program
OPTION + COMMAND + eject into hibernation
Shift + Command + q Log off the current user

control + 1/2/3/4 or control + up/down/left/right switch 1/2/3/4 space

Fit Input:

control + +/ -page
OPTION + 1 to delete the most pre-defined custom phrase
shift in English toggle
COMMAND + Space Input Method switch

Mac shortcut keys