Every Mac with a Mini DisplayPort allows you to connect an external display or projector using an adaptor. You can use an external display as main workspace or to extend desktop, or you can work in mirrored mode with a projector so you can view what audience sees. Use the Mini DisplayPort to DVI Adaptor to connect an advanced digital monitor, such as the 20- or 23-inch Apple Cinema Display, that includes a DVI connector. Review the documentation or check with the manufacturer of monitor to make sure you're choosing the right adaptor. Compatible only with Mac computers with Mini DisplayPort.