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You need the following...

Mini-DVI->DVI adapter (one should have come with the iMac)
DVI-D->HDMI cable of the desired length. This will not transmit audio.

TEG
 
You need the following...

Mini-DVI->DVI adapter (one should have come with the iMac)
DVI-D->HDMI cable of the desired length. This will not transmit audio.

TEG

I'm confused?! ---I didn't get one with my iMac. I checked apple website
"Mini-DVI output port with support for DVI, VGA, S-video, and composite video connections via adapter---Adapters are sold separately."
 
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