Mini-DisplayPort to DVI Adapter

• Use an external DVI-compliant display as your main workspace or you can extend your workspace onto two HD displays.
• The Adapter can work in mirrored mode with a DVI projector so an audience can view a laptop screen. 
• Supports HDMI through a DVI to HDMI cable, available separately
• Supports digital DVI video resolutions up to 1080p and 1920x1200@60 Hz
• Compact, lightweight adapter cable fits in any laptop bag

I bought this at Gefen support's recommendation, when the Gefen product I had bought previously could not do what I bought it to do. My goal was to to connect a PC via DVI to a 27" iMac via Mini Display Port, so that I could use my iMac to display signals from the PC or the iMac by choice, eliminating the need for a separate PC monitor. Admittedly, it never says it can do that in the marketing text, but the Gefen tech support rep assured me that it would do it. Alas, it cannot. Funny enough, Gefen is often recommend due to their "great tech support", but on the two Gefen products I have owned, their tech support has proven not to understand the product and what it can and can't do. They're quick with an answer, I must say. But the answers need to be right for the support to be great in my opinion. I think that I'm done with Gefen products now.

Buy Mini-DisplayPort to DVI Adapter Now

This adapter works perfectly and is very well made, well worth the money for what you get. I tried using a cable I bought at Amazon to go from a mini displayport to DVI and it was crap. This product works very well and the quality is key. I have always had good results from Gefen products... though sometimes they are a bit pricey.