Displaying HDTV Image onto iMac

Is there a way to display the image from your HDTV to the iMac?
I have a 1080p 60Hz LCD television and a 27" iMac i7.
Thanks for your help.
Message was edited by: Andy O'Neil

Thanks for chiming in, Scott. Am I to presume that the Mini DisplayPort on the back of the iMac is interchangeably an input or an output port?

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Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
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Test while logged in as Guest. Same problem?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
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Step 2
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Test while in safe mode. Same problem?
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Best Dirk

Hi Dirk Michael,
Welcome to Apple Support Communities.
It sounds like there is an issue with the image quality on a Cinema Display connected to your iMac. Try calibrating your display as shown in the first article below, also use the second article to verify you're using a compatible video adapter.
OS X Mavericks: Calibrate your display
http://support.apple.com/kb/PH13768
Get help choosing Mac video adapters - Apple Store (U.S.)
http://store.apple.com/us/mac/mac-accessories/cables/cable-chooser#!
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import java.awt.MediaTracker;
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Can I connect a 27" Cinema Display to an ageing iMac? I have a Mini-DVI to DVI Adapter fronting a Kanex C247DL to complete the MIni-DVI to mini display port. Sound is good but screen is black.

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http://support.apple.com/kb/ht1573
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Displaying HDTV Image onto iMac

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