I am unable to dual monitor

Question

I am unable to dual monitor

I have a 2019 iMac and a 2013 MacBook Pro. Also have USB-C to HDMI cable But I am unable to dual monitor. Please help!

[Re-Titled by Moderator]

Posted on Sep 13, 2020 3:28 PM

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Answer 1

BDAqua

Level 10

240,071 points

Sep 14, 2020 6:17 PM in response to A1PooperScooper

Is the 2010 iMac a 27"er & running 10.13.6 or less?

27-inch iMac models introduced in 2009 and 2010: Use a Mini DisplayPort cable to connect your iMac to a Mini DisplayPort or Thunderbolt or Thunderbolt 2 port on the other Mac.

Target display mode requires macOS High Sierra or earlier on the iMac used as the external display. It does not work with macOS Mojave or later.

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Answer 2

rkaufmann87

Level 10

141,114 points

Sep 13, 2020 3:31 PM in response to A1PooperScooper

Target Display Mode will not work, your iMac is too new. We are asked this question multiple times every day and the answer is always the same. Target Display Mode was discontinued in 2015 for iMacs. If your MBP needs an external display, please buy one...the good news is they have come way down in price.

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Answer 3

Sep 14, 2020 4:36 PM in response to rkaufmann87

Hi! So today I acquired my USB C to mini display port cable. I took the USB C output from my new 2019 27” iMac

and connected it to my very old 2012 iMac.

So hoping that I could get dual monitoring to happen.

It did not. :(

I tried messing with the system preferences of both computers with “display”.

(Even tried the command F2 that I have read about).

Still no luck.

Perhaps it is just incompatibility and cannot happen.

Do you know if I can make this work??

The good news is that I did borrow a cheap inexpensive monitor and hooked it up from my new 2019 iMac using USB-C to HDMI and it did work! Would just so much prefer to hang onto my older 2012 iMac and use it for the dual monitoring. Any ideas?

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Answer 4

Sep 13, 2020 4:03 PM in response to A1PooperScooper

Thank you so much for your reply.

Are you saying that I am not able to do any dual monitoring with my new 2019 iMac entirely?

If I get some cheap monitor am I able to screen monitor with my iMac?

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Answer 5

rkaufmann87

Level 10

141,114 points

Sep 13, 2020 4:14 PM in response to A1PooperScooper

You can connect an external display on your 2019 iMac if that is what you mean. If that is not what you mean please re-write your question, sometimes I'm a little thick. 😀

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Answer 6

Sep 14, 2020 4:37 PM in response to A1PooperScooper

Whoops! Correction. My old iMac is a 2010!!

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I am unable to dual monitor

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