Older macbook pro connecting to HDMI?

What MBP do you have?

There are mini-DVI to HDMI connectors that should work, but there is an issue with older MBP's where the sound isn't transmitted. You need to run a separate sound out (from your Mac) to the TV's sound-in.

As your Mac gets older, there appear to be incompatibilities that may make this difficult.

All non-unibody MBPs have dual-link DVI video-out ports, so you will need a DVI-to-female-HDMI adapter and a standard HDMI cable. But the MBP's DVI port does not output an audio signal (because DVI doesn't carry audio), so you'll need to make a separate audio connection from the Mac's headphone port to the RCA stereo audio inputs on your TV set, and the TV set will have to be capable of receiving separate audio and video signals. In other words, you'll need to set the TV to recognize video input via one of its HDMi ports and audio via its analog audio inputs. That will be done in the TV set's menu system, if the TV permits it. Be aware that there may be a particular HDMI port on the TV that you must use, because it is internally paired with those audio inputs. See the TV's manual for instructions.

You may also need to select the TV as the sound output device in the Sound pane of System Prefs on the Mac.

Did you check out the "More Like This" section over here--------------------------------->

That photo is of no help at all. It looks like one of a dozen different MacBook Pro's. Go to the Apple Menu, pull down to About this Mac, and you should be able to give us the model.

You can obtain a DVI to HDMI cable, which should run the video, but definitely not audio.