HT3924 Using  a 27-inch iMac (Mid 2012) as an external display?

As I have been using MacBook Pro (Mid 2010) and Mac Air (Mid 2011) for business purpose, I wanna use them working at home.
I really expected that there was new cinema display with Retina display, but there wasn't. However, New iMac looks really nice & I would love to buy it.
But Using a 27-inch iMac(Mid 2012) as an external display is one of my important required function to buy it.
What do you think? is a 27-inch iMac (Mid 2012) able to use target display mode?

there's a lot of misinformation so far here. Yes you can use all the 27-inch iMacs as external displays.
However there a few problems.
2009-2010 27-inch iMacs can only work with Apple computers that have the Mini-DisplayPort.
2011-2012 21-inch and 27-inch iMacs can only work as a display with Macs that have thunderbolt ports.
so as long as your 2011 MBA has thunderbolt, the new one will do fine. your 2010 MBP will not be able to use the iMac as a display.

Similar Messages

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    Welcome to the Apple Support Communities
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    Welcome to Apple Support Communities
    You are referring to Target Display mode. Target Display mode can only be used in 27-inch iMacs and iMacs with Thunderbolt, not MacBooks Pro > http://support.apple.com/kb/PH11302
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    I would like Using a 27-inch iMac as an external display for my mac book air.
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  • HT5219 I have a macbook air (mid 2012) and a thunderbolt display. Do I absolutely need to connect the power supply together with the thunderbolt cable ? I found that the screen won't wake up if only the thunderbolt connection is plugged.

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    Apple computers: Troubleshooting issues with video on internal or external displays
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