Get a second-life from an old iMac by turning it into a monitor for a new Apple Mac computer. This feature shows you how to use one Mac's monitor as a display for another Mac.

If you have need to connect a second monitor to your Mac and have a spare iMac lying around, here's how to use an iMac as a second monitor.

You might wonder why this is a feature, since it bypasses a perfectly good iMac computer to use it as an external monitor.