Secondary Monitor Connecting Issues

Question

Level 1

8 points

Secondary Monitor Connecting Issues

Attempting to use my older 2011 iMac running High Sierra as a secondary monitor to my newer 2013 iMac. Connected with Mini Display connected in the Thunderbolt ports and not working. The Command-F2 or Command-Fn-F2 key strokes don't do the trick. HELP!

MacBook Air 13″, macOS 10.12

Posted on Jun 23, 2020 6:22 PM

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Answer 1

BDAqua

Level 10

240,683 points

Jun 23, 2020 7:17 PM in response to rlogan

Oh wait,,. you said Mini Display! Wrong cable. :)

27-inch iMac models introduced in 2009 and 2010: Use a Mini DisplayPort cable to connect your iMac to a Mini DisplayPort or Thunderbolt or Thunderbolt 2 port on the other Mac.
All iMac models introduced in 2011, 2012, 2013, and mid 2014: Use a Thunderbolt cable to connect your iMac to a Thunderbolt or Thunderbolt 2 port on the other Mac. If the other Mac uses Thunderbolt 3, you can use the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter with your cable.

Target display mode requires macOS High Sierra or earlier on the iMac used as the external display. It does not work with macOS Mojave or later.

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Answer 2

rlogan Author

Level 1

8 points

Jun 23, 2020 7:22 PM in response to BDAqua

A tech guy told me to use the mini player cable! Way too many people with way too many suggestions. However, I’ll get the other cable tomorrow and see if it magically works!

I appreciate your help and will take any suggestions.

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