Resolution of iMac mid 2010 in Target Display Mode

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Schusz Author

Level 1

4 points

Resolution of iMac mid 2010 in Target Display Mode

I want to connect my MacBook Air 2015 to my iMac 27" mid 2010.

What will the resolution be of the iMac screen when it is in Target Display Mode?

iMac 27", macOS 10.13

Posted on Mar 28, 2020 1:13 PM

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Answer 1

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Malcolm J. Rayfield

Level 7

22,987 points

Mar 28, 2020 8:12 PM in response to Schusz

A Thunderbolt cable won't work, even though the plugs will fit. The mid 2010 iMac uses Mini DisplayPort.

iMac (27-inch, Mid 2010) - Technical Specifications

Use your iMac as a display - Apple Support

You need a Mini DisplayPort to Mini DisplayPort cable, such as:

https://www.startech.com/Cables/Audio-Video/DisplayPort/6-ft-Mini-DisplayPort-Cable-Male-to-Male~MDISPLPORT6

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Answer 2

Schusz Author

Level 1

4 points

Apr 2, 2020 12:16 PM in response to Schusz

I bought a mini DisplayPort to Mini DisplayPort cable, logged into my MacBook and iMac, then connected them with the mDP cable.

I didn't even have have to press CMD-F2, the iMac immediately displayed the MacBook screen.

Resolution indeed is 2560 x 1440.

And the iMac also displays my Dell's screen when I use a DisplayPort to mini DispalyPort cable :-).

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Answer 3

Mar 28, 2020 2:11 PM in response to Schusz

2560x1440. I have the 2009 27 one and do the same thing

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Answer 4

BDAqua

Level 10

241,007 points

Mar 28, 2020 1:51 PM in response to Schusz

Hi Schusz, I can't check this but I think it might be selectable in the Displays Pref Pane.

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Answer 5

BDAqua

Level 10

241,007 points

Mar 28, 2020 2:48 PM in response to Timothy_Peace_1412

Thanks Timothy, is it adjustable in the Displays Pref Pane?

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Answer 6

Schusz Author

Level 1

4 points

Mar 28, 2020 5:36 PM in response to Timothy_Peace_1412

Thanks. I now have ordered a Thunderbolt 2 cable.

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Answer 7

Schusz Author

Level 1

4 points

Mar 29, 2020 6:04 AM in response to Malcolm J. Rayfield

Thanks Malcom, I didn't realise that. I'll get an mDP-to-mDP cable instead.

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Resolution of iMac mid 2010 in Target Display Mode

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