Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. You probably already know how to scan a QR code with your phone. It ...

You can scan a QR code using the camera on your smartphone, tablet, or computer — however, you may need to download an app.

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To mirror your iPhone's screen to a Mac computer, you can use QuickTime or AirPlay. Here's how to do both.