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IMAC late 2015 dual monitor

I have a 21.5, Late 2015 in which I purchased the same model to connect as a second monitor. I used a thunderbolt cable but when I press cmd-f2 nothing happens. How do I get it to work?

iMac Line (2012 and Later)

Posted on Sep 14, 2021 4:28 PM

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Posted on Sep 14, 2021 4:32 PM

A late 2015 iMac does not support Target Display Mode.

see > https://support.apple.com/en-us/HT204592

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IMAC late 2015 dual monitor

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