Write an article based on this "Open a web browser. Open the Web QR website. Hold your QR code up to the camera. Center the QR code in the scan window. Wait for the code to scan."
There isn't a built-in way to scan a QR code on your Mac, nor is there an app available to do so. If you want to scan a QR code, you'll have to use an online QR code scanner. Go to https://webqr.com/. This website scans QR codes using your Mac's built-in webcam. On some browsers (e.g., Google Chrome), you will have to click Allow when prompted to grant the website access to your camera. Your QR code should be facing the Mac's camera. You'll see the code appear in the scan window that's in the middle of the page. You can also upload a QR code from your computer by clicking the camera icon above the top-right corner of the scan window, clicking Choose File, clicking the QR code image, and clicking Open. Make sure that all four edges and corners of the QR code are inside of the scan window. Once your Mac's camera focuses on the code, you'll see the code's content appear in the box at the bottom of the page. You can then click the content to open it if you want.