December 3, 2022
Using the 27inch iMac as an External Display

Using the 27inch iMac as an External Display

Posted November 26, 2009 at 9:51pm by iClarified · 7685 views
Apple has posted documentation on how to use the 27 inch iMac as an external display.

To use a 27-inch iMac in Target Display mode with another computer as the source:

Step One
Make sure both computers are turned on and awake.

Step Two
Connect a male-to-male Mini DisplayPort cable to the Mini DisplayPort on each computer. The 27-inch iMac will enter Target Display Mode and display content from the source computer.

Note: If you are connecting two 27-inch iMacs, connect a Mini DisplayPort cable to each computer and press Command + F2 on the 27-inch iMac keyboard that you will use as an external display.

Step Three
To leave Target Display mode, press Command + F2 on the keyboard of the 27-inch iMac that is in Target Display mode. To return to Target Display mode, press Command + F2 again.


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Using the 27inch iMac as an External Display
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Tom
Tom - November 27, 2009 at 12:26am
Useless curiosity: If I were to press command F2 on both computers would I essentially have them with their displays swapped, or is there something to prevent both from entering target mode
Manuel Lino
Manuel Lino - November 27, 2009 at 12:21pm
Don't think so, DisplayPort probably is a "one way only" video cable. If you press Command + F2 in the master mac, may be it will change to target display mode, and the old slave mac change to master.
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