| Command | Cmd | Control | Ctrl |
| Function Key | Fn |
| Option Key | Alt |
| Hash/Pound (#) Symbol | Alt + 3 |
| Force Quit Mac | Cmd + Alt + Esc |
| Free Mac Memory | Type "purge" in Terminal (Without quotation marks) |
| Sleep/Restart/Shutdown Menu | Ctrl + Eject |
| Log Out | Cmd + Shift + Q |
| Lock Mac / Turn off Screen | Ctrl + Shift + Eject |
| Put Mac to Sleep | Cmd + Alt + Eject |
| Restart Mac | Cmd + Ctrl + Eject |
| Shutdown Mac | Cmd + Alt + Ctrl + Eject |
| Take Screenshot of Screen and save to Desktop | Cmd + Shift + 3 |
| Take Screenshot of Screen and save to Clipboard | Ctrl + Cmd + Shift + 3 |
| Take Screenshot of Selected Area and save to Desktop | Cmd + Shift + 4 |
| Take Screenshot of Selected Area and save to Clipboard | Ctrl + Cmd + Shift + 4 |
| Take Screenshot of Window and save to Desktop | Cmd + Shift + 4 then press space and click window |
| Take Screenshot of Window and save to Clipboard | Ctrl + Cmd + Shift + 4 then press space and click window |
| Turn Zoom On or Off | Option + Cmd + 8 |
| Zoom In with Keyboard | Option + Cmd + = |
| Zoom Out with Keyboard | Option + Cmd + - (minus symbol next to 0 button) |
| Zoom In with Mouse or Trackpad | Hold Ctrl + Scroll Mouse Button or 2 Fingers on Trackpad Forward |
| Zoom Out with Mouse or Trackpad | Hold Ctrl + Scroll Mouse Button or 2 Fingers on Trackpad Backward |
| Boot Menu / Restart in Windows Bootcamp | Hold Alt while Booting Up |
| Startup in Safe Mode | Hold Right Shift while Booting Up |
| Recovery Mode (Repair, Reinstall, Time Machine Backup) | Hold Cmd + R while Booting Up (Only in OS X Lion or Later) |
| Reset NVRAM | Hold Cmd + Alt + P + R while Booting Up |
Print Screen on Mac, a.k.a Screen Capture, gives you a variety of options unlike the Windows print screen. You can capture a screenshot of the whole screen, or a selection of the screen, or just an application window; and you don't need to use a screenshot tool to do this because it's built straight into the mac software! This works on any type of Mac running Leopard, Snow Leopard, Lion, or Mountain Lion. So it doesn't matter if you have a Mac Mini, Macbook Pro, iMac, or Mac Pro; these features will work on all of them as long as you have the OS (Operating System).
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