Mini DisplayPort to HDMI Adapter Cable, 6 feet

Found this item online and thought it would be the most cost efficient option. Turns out I was right. With this, not only do I save myself from buying a $35 adapter, but a $10 HDMI cable too. I was a bit skeptical on whether or not it would work, as there is no specific brand listed, but it works perfectly. It delivers both video up to 1080p and clear, stereo audio. I am happy with my purchase.

For those of you who are having a hard time getting the audio to work:
* Your computer must support audio over the Mini DisplayPort. To find out if it does, go to System Profiler (option-click the Apple menu, System Profiler...), click the audio tab, and under the outputs should be listed: "HDMI / DisplayPort Output." If it is not listed, chances are your computer does not support it.
* You must select your TV as the output device. To do this, either option-click the audio menu icon and select it under "Audio Device:," or go to System Preferences (Apple menu -> System... Read more

Edit On 2/6/2012:

When I Originally wrote this review I had the 2011 Early MacBook Pro Model(one without the Thunderbolt port which Mac started to sell late February) With Snow leopard Mac OS X v10.6.

I still have the same MacBook as well as the Cable that still works wonderfully. I've upgraded to Lion so the Original post is more directed towards those who have Snow Leopard, because in Lion they change a couple of features on how to locate the HDMI Audio.

The port your looking for is called: FireWire 800 port - there are some models who have the 400 port, I honestly never tried to use this with a 400 port version so I can't tell you the difference between the two.

If you still have box/packaging that your MacBook/Mac Mini/Whatever Mac Device you have, check to see if you have FireWire 800 port listed under technical specifications. More than Likely this cable will work for you. If you don't have the box or the manual then you check it... Read more

This cable was certainly a good investment. You do not need to buy another HDMI cable (which can ve very expensive), and the image is very good: sharp, perfect colors. My MacBook Pro has immediately recognized my TV and set the correct profile.
Concerning audio there a lot of review complaining that the cable does not convey audio signal: the problem does not come from the cable but from your MacBook. Audio output was added to the MacBook Pro on April 13, 2010. Previous models do not support audio output through the mini display port.
This was not a problem for me, because I use my stereo for audio output.

08/04/2011: I have tried the cable on a new Dell XPS laptop, and both audio and video worked. So if you have no audio, you should really check that your mini-displayport does actually output audio.