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ScreenSavers

macrumors 68000
Original poster
Feb 26, 2016
1,970
1,382
Bloomingdale, GA
Long story short, I want a monitor that matches my current 5K iMac in appearance, and I'm considering using another 27" iMac as a target display. I know the Retina 5K iMacs don't support TDM. If I got a 2012 or 2013 27" iMac, would I have any issues using it as an external display for my 5K iMac (other than the obvious resolution difference?) Has anyone tried this successfully?
 

chrfr

macrumors G4
Jul 11, 2009
11,189
4,753
Long story short, I want a monitor that matches my current 5K iMac in appearance, and I'm considering using another 27" iMac as a target display. I know the Retina 5K iMacs don't support TDM. If I got a 2012 or 2013 27" iMac, would I have any issues using it as an external display for my 5K iMac (other than the obvious resolution difference?) Has anyone tried this successfully?
It'll work but you may need to buy a Thunderbolt 2 to 3 adapter (if your 5k is a 2017 or newer) as well as a regular Thunderbolt cable, and the older screen is dramatically inferior to that in a 5k iMac.
 
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ScreenSavers

macrumors 68000
Original poster
Feb 26, 2016
1,970
1,382
Bloomingdale, GA
My 5K sadly is a 2015… I know, I wish it was a 2019 but I’m waiting for a redesign to upgrade.

Did not know that TDM was removed in Mojave. Thanks for that info.

And yes I have owned a lot of iMacs and I am fully aware that the non-retina ones are inferior… if the retina ones supported TDM I’d get another one.
 

The_Croupier

macrumors 6502
Oct 11, 2018
313
221
This article tells you everything you need to know.
One statement from that article to remember:
So in my case if i want to use my 2010 27" iMac as a display for my 2011 27" iMac i need just the mini port to mini port cable (mini port ------- thunderbolt port)

Is this correct?
 
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