1. Jump to Last Used Program: Cmd + Tab
2. View Program Switcher: Press and Hold Cmd, Then Tap Tab
3. View All Windows: Ctrl + Up Arrow
4. Show Desktop: F11
5. Hide Window: Cmd + H
6. Move to Trash: Cmd + Delete
7. Empty Trash without Warning: Cmd + Opt + Shift + Delete
8. Undo Last Action in Finder: Cmd + Z
9. Take Screenshot: Cmd + Shift + 3
10. Take Screenshot of Selected Area: Cmd + Shift + 4
11. Open Link in New Tab: Cmd + Click a Link
12. Change Volume without Clicks: Hold Shift
13. Power on without Noise: F10 + Power Button
14. Use Emoji Keyboard: Cmd + Ctlr + Space
15. Use Special Characters: Hold Letter Key
For a complete list of Mac hack keyboard shortcuts, see Apple’s official list here. Featured photo credit: Pete Markham via flickr.com