- Click the Apple icon in the top left of the screen.
- Click System Preferences.
- Click “Desktop & Screen Saver” on the first row.
- Make sure you have the correct screen saver selected.
- Hold down the cmd + Shift keys. Don’t let go until step 8.
- Click the Test button. The screen saver will appear.
- When you are ready, press the number 3 on your keyboard.
- Let go of the cmd + Shift keys. The screen saver should go off and the screenshot will appear on your Desktop as an image file.