Does the 21.5" iMac support TDM or not?

I am looking to buy an iMac to use in conjunction with my Macbook Air (2012). I want to be able to view my Macbook's screen on the iMac (i.e. use it as an external monitor).

According to the TDM frequenty asked questions, a late 2012 21.5" iMac is able to connect to another computer thunderbolt to thunderbolt. However, when I went into the Apple store today to purchase an iMac, I was told by two different people that TDM is not actually supported by the 21.5" model and that I couldn't use it as an external montior. The information on the Apple website certainly seems to indicate that I should be able to.

Can anyone tell me which information is correct?

Thanks!

iMac

Posted on Sep 5, 2013 12:52 AM

31 replies

marbaque

Level 1

11 points

Jul 21, 2017 6:54 AM in response to tammylig

Can you confirm that? I have a iMac (21.5-inch, Late 2009) that I want to use it as a second monitor on my 2015 15" Macbook pro.

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Does the 21.5" iMac support TDM or not?

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