Open the Camera app, Photo Booth, or FaceTime
Allow camera access if prompted
Click the shutter button or camera icon
Use the built-in screenshot shortcut for the screen:
Press Shift + Command + 3 to capture the full screen
Press Shift + Command + 4 to capture a selected area
Press Shift + Command + 5 to open screenshot options
To take a photo with your iPhone and import it to Mac, use AirDrop or Photos
To save the picture, check the Downloads folder or the app’s save location