How can I use an Imac as a display for a MacPro?

I purchased a used 2009 MacPro with the understanding I could use my iMac as a monitor using a mini display cable. I was under the impression that plugging in the mini display cable would cause the iMac to automatically default as a display for the MacPro. In all of the examples I've seen are of a laptop using an iMac as a display. I don't know how to access the Mac Pro's system preferences without a monitor to set up the iMac as a display. Any suggestions?
Thanks

OS X Mountain Lion: Use another Mac as a display
The feature seems to require Thunderbolt or 27" iMac.
Then Command-F2 on the display Mac.

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Can I use my iMac as a 'display' for my MacBook Pro?

Hi all, I am really hoping someone can help me here.
I am wondering if I can use my 24" iMac as a display for my MacBook Pro (both running Snow Leopard).
It's my father's 80th birthday party in about 24 hours time. I am doing up the music and slideshow (thanks Apple - so easy!).
My plan was to simply take my iMac and use it. However, I managed to drop the wireless keyboard (darn those dogs) and now my keyboard won't work. I have no backup keyboards here (gave the wired one to Dad to use with his Mac mini). I live in a country area with no access to a Mac store and it will take more than 24 hours to get a new one. Went to my local 'other computer' general store last night: I really don't want to buy an ugly black keyboard..... I have just had a great idea:
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The imac 24 can't be used as a monitor over a DVI connection or the like, Suzanne, but you may be able to achieve what you want to using "Screen Sharing" by networking the two computers. This lets your MBP effectively control what is running on the iMac.
See HERE for the basic setup. For information about how to access the "shareable" screen from the MBP see HERE.
One possible problem may be actually getting this set-up on the iMac if it is not already enabled, however, unless you can borrow a keyboard from someone (your password may have to be entered to enable it). You may be able to get around this, if necessary, using the "keyboard viewer" (which you can place in the menubar using System preferences > Keyboard, if you don't already have it there).
Cheers
Rod

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Shivneet wrote: ... I would like the display for the MacBook to be turned off so I can see video only on my TV. ... Is there any way to achieve this?
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Message was edited by: EZ Jim
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Here are the search results for iMac Target Display Mode in these fora.

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How can I use an Imac as a display for a MacPro?

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