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You don't happen to know a product that'll do NTSC- or HDTV-out from a laptop, do you?

Also keep in mind that if your HDTV happens to have a five-wire RGBHV input (like mine), then all you need is the proper cable. An RGBHV input is usually five ganged RCA plugs color-coded red, green, blue, white, and yellow.

The RGBHV input on an HDTV is just the same a VGA output. All you need is to get what's called a "breakout cable", which converts the VGA D-sub connector into five RCA connectors.

I built one of these breakout cables myself with Radio Shack parts, but they can be bought at places like bettercables.com .

On my PC, I have to run the PowerStrip utility to tweak the scan frequencies slightly so that it all looks right on the TV. I don't know how much control a Mac will give you over the scan frequencies, you could research that.
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Tony Fabris