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I'm considering getting an iMac to be an external display for my Air via the Thunderbolt cable. When you put the iMac into Target Display Mode is it still available as a headless computer without a display?

UPDATE: close question, but oposite Will my iMac stay on if I use it's display in target display mode for a Mac mini?

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up vote 1 down vote accepted

Yes the iMac does stay on, I have the 2010 model. CMD + F2, (on your iMac), will allow you to swap back and forth between the two computers.

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You can also look in the Apple Support Document: – gruberb Jan 7 '12 at 18:46
yes thanks! "Applications running on the 27-inch iMac computer remain open and running while it is in Target Display mode." – kenny Jan 7 '12 at 21:59
Glad we could help. I just ordered my Belkin cable yesterday, took me a while to figure this out as well. – Jonathan Musso Jan 7 '12 at 22:58

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