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Using 2017 iMac as extended display for 2020 MacBook Pro

I purchased a 21.5" 2017 iMac and I want to use it as an extended display for my MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports). I bought the Thunderbolt 3 (USB-C) Cable and have tried Command F2 but nothing is happening. What should I do?

iMac 21.5″, macOS 10.15

Posted on Oct 11, 2020 8:29 AM

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Posted on Oct 11, 2020 9:54 AM

And 2020 Macs can no longer take advantage of Target Display Mode:


From the now-archived support TDM article:


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Using 2017 iMac as extended display for 2020 MacBook Pro

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