Document camera app for Mac: connect a camera in Vizo

Select the built-in camera, a USB webcam, or a document camera for Present and Scan. A normal camera works; a document camera is better for paper.

Connecting the camera is its own step. Present adjustments and Scan modes come after Vizo can see the device. The built-in camera and a USB webcam both work. A document camera is steadier and clearer for books and worksheets.

Plug it in and choose it

Install Vizo from this website. macOS 11.5 or later.
Allow Camera when asked. Allow Microphone only if you will record or Live Stream with voice.
Open Vizo and select that camera for Present or Scan.

Screen Record needs Screen Recording permission, not a camera. If the preview is black, quit the other app that holds the camera and reopen Vizo.