MacOS X: My Missing Manual

Here is a list of accelerators and how-to related to Yosemite. It will be maintained and updated regularly.

Accelerators

Keyboard Symbols

⌘	Command
⌃	Control
⌥	Option
⇧	Shift

Boot

Select Startup Volumes	⌥
Boot to OSX Recovery	⌘ + R
Apple Hardware Test	D

Boot in MacOS Classic

Disable Extensions	⇧
Boot from CD	C
Force to boot from Internal HDD	D
Reset Power Manager	⌃ + ⌘ + ⇧ + Power
Zap PRAM	⌘ + ⌥ + P + R

Chinese Symbols

、	\
⋯⋯	⌥ + ;
，	,
。	.

English Symbols

…	⌥ + ;
¥	⌥ + Y
“	⌥ + [
‘	⌥ + ]

File Management

Move to Trash Immediately	⌘ + Delete / Backspace
Empty Trash	⇧ + ⌘ + Delete / Backspace

Finder

Move Selected File(s)	⌘ + Drag
Copy Selected File(s)	⌥ + Drag
Show Info	⌘ + I
Create a New Folder	⌘ + N
Search	⌘ + F
Move Selected Files(s) to Trashcan	⌘ + Backspace
Move Up to selected Folder	⌘ + ↑
Move In to selected Folder	⌘ + ↓

Miscellaneous

Toggle Language	⌘ + Spacebar
Reset NVRAM / parameter RAM	⌘ + ⌥ + P + R
Force to Restart	⌘ + ⌥ + Power
Display Sleep	⇧ + ⌥ + Media Eject ⏏
Copy without formatting	⇧ + ⌘ + ⌥ + V

Screen Capture

Whole Screen to File	⌘ + ⇧ + 3
Select Window to File	⌘ + ⇧ + 4 Use Mouse and Spacebar to select. Mouse click to capture.
Whole Screen to Clipboard	⌘ + ⌃ + ⇧ + 3
Select Window to Clipboard	⌘ + ⌃ + ⇧ + 4 Use Mouse and Spacebar to select. Mouse click to capture.

Switch Among Apps and Windows

Switch Apps	⌘ + Tab
Display Open Windows of Focus App	⌃ + ↓
Display All Apps in Groups	⌃ + ↑

Mini How-To

Enable Switching Input Source by ⌘ + Spacebar

Enable [System Preferences] → [Keyboard] → [Shortcuts] → [Input Sources] → [Select the previous input source] and also disable [System Preferences] → [Keyboard] → [Shortcuts] → [Spotlight] → [Show spot light search].

Use Virtual Keyboard to Input Symbols

AppleUser: 不用再問怎麼打，Mac 標點符號超快輸入學習方式！

Enable [System Preferences] → [Keyboard] → [Keyboard] → [Show Keyboard & Character Viewer in menu bar]. Now, you may select [Show keyboard viewer] from language menu.

Set root password

In terminal, use $sudo passwd root to setup password for root. Forget after reboot.

Reference

1. About.com: How To Capture a Screen Shot with Mac OS X
2. Apple: OS X: Keyboard shortcuts
3. Apple: OS X Lion: Use Apple Hardware Test
4. AppleUser: 不用再問怎麼打，Mac 標點符號超快輸入學習方式！
5. Beginners Mac Blog: Copy and Paste Without Formatting
6. OSX Daily: 4 Useful Trash Keyboard Shortcuts Every Mac User Should Know
7. Wiki: OS X: 5.12 Version 10.10: “Yosemite”
8. 知乎：macOS 有哪些常用的快捷键？