Can I use a 27" iMac for target display mode?

ScreenSavers

macrumors 68000
Original poster
Feb 26, 2016
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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 G3
Jul 11, 2009
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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
1,569
900
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.
 
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