# Target Display Mode

The late 2009 iMac 27" supports “video in” to turn the display into an external monitor for another device through the **Target Display Mode** feature:  
**[http://support.apple.com/kb/HT3924](http://support.apple.com/kb/HT3924)**

An iMac in this mode still runs applications. It requires a third part Mini DisplayPort cable to function, as Apple has specifically stated they will not be producing such an adapter.