Problem with second monitor operation

Question

Problem with second monitor operation

I purchased a new 2020 iMac. I connected my old iMac (2011) as a second monitor via usb cable (adapter). I started my new Mac, I then pressed "command" + F2 and the second monitor worked perfectly. When I put the new Mac to sleep or turn it off both monitors go black (asleep). But when I restart the new Mac I have to (again) press the command F2 key to command the second monitor to perform as a second monitor. Is there a way to command the second monitor to always perform as a second monitor? I have called A[ple 2 times and they can't figure it out.

Posted on Jan 23, 2021 3:37 AM

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Answer 1

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den.thed

Level 9

78,244 points

Jan 23, 2021 8:34 AM in response to mikefromhonoraville

Your 2011 iMac does support Target Display Mode. However your 2020 iMac does not support using another iMac as a display. carefully study > https://support.apple.com/en-us/HT204592

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Answer 2

Jan 25, 2021 4:32 PM in response to Malcolm J. Rayfield

Well, I suppose you are correct but...I asked Apple several times if I could use my new iMac as a monitor and I was told YES every time I called. I took my time and tried to cover all my bases before I ordered the computer but apparently I was told wrong. I guess I will buy me another Dell to use as a second monitor. Thank you for you reply.

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Answer 3

Jan 24, 2021 1:38 AM in response to mikefromhonoraville

Your new iMac must be a 2019 model, even if purchased later, or it would never have worked.

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Problem with second monitor operation

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