How to Use My TV screen as a Computer Screen

Hi everyone,
I have a 24" Intel IMAC, 1 year old. Great computer! I saw in some other posts that this is possible but I didn't quite understand what I need to do. I would like to use my TV screen as a computer screen, so I can watch things like my subscription to MLB.TV or any other video that I can play on my IMAC. I saw in some posts about using an Apple Video Adapter. Please be specific for me, is that what connects from the back of my IMAC? If so which slot? And going out from the computer, what does that connect to? What should I buy? And from there I can use a composite cables to connect to my TV? Yes, I have inputs for those on the TV.
Thanks in advance to anyone who helps.
Bill

Your TV based on the jacks present (which are the same as ports), sound like quite an antique. Modern TVs have special jacks for computer hookup. Sounds like your TV has none. The best you'd hope to achieve is 720 x 480 resolution which would result in very little room for the windows on your screen, and very large text on your TV. Trying to even get the menubar and dock on the screen will be a challenge since TVs that only offer 720 x 480 resolution don't offer any screen area beyond the screen safe area for the menubar and Dock to be visible. It will just center on the screen's center, cutting off 20% of the exterior four sides. Ideally you'd want a 1080P HD-TV for computer hookup.

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