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I have bought a new iMac 27" and would like to use my old iMac 27? as a 2. Monitor. Can I connect with an Ethernet Cable?

I have bought a new iMac 27" and wouldlike to use myold iMac 27" as a 2. monitor. Can I do this with an Etherent cable?

Thanks for help..

iMac, OS X Mountain Lion (10.8.2)

Posted on Dec 23, 2012 1:09 AM

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4 replies

Dec 23, 2012 3:39 AM in response to LousyFool

Thanks,


my old iMac 27" is late 2009 and has a Mini Display Port but my new one has none (but USB 3.0 and Thunderbolt).

I am using the Mini Display Port of the old one already for my TV to play my videos directly there.


I assume, that I have to get an adapter (which one? via Thunderbolt?)) for my new Mac to connect with my old one. Furthermore, because I want to keep my Mini Display Port from the old Mac for the TV connection, is there an adapter to plug in 2 or more Mini Display Ports?


Best would be, if I can connect from my new Mac to both, the TV and the old Mac ??


Thanks for your help

Dec 23, 2012 6:05 AM in response to Dieter45

Thunderbolt has minidsplayport functionality in it.


Purchase a Mini Displayport to Mini displayport Cable and plug 1 end into a thunderbolt port of your new iMac and the other end into the Mini Displayport of your old Mac.


Then put your old iMac into target display mode using these methods:


- Here for slightly older iMacs.

- Here and here for younger iMacs.




And it is as simple as that.


If you still want to use your TV as another screen, plug the minidsplay port->HDMI cable into the other thunderbolt connection of your new iMac.


You might want to get a thunderbolt hub, since you will be using both ports on your new iMac this way.

I have bought a new iMac 27" and would like to use my old iMac 27? as a 2. Monitor. Can I connect with an Ethernet Cable?

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