I have a MacBook Pro 2017 and a iMac 21.5" mid 2011, I would like to use the old iMac as a 2nd monitor

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I have a MacBook Pro 2017 and a iMac 21.5" mid 2011, I would like to use the old iMac as a 2nd monitor

hi I have a MacBook Pro 2017 and a iMac 21.5" mid 2011, I would like to use the old iMac as a 2nd monitor, it has a thunderbolt socket on the back but i'm unsure if it will work or if its too old to use as a 2nd monitor ie pre mini displayport capable ? I would like to know if this will work using a usb-c - thunderbolt adapter and a thunderbolt male to male lead costing £80..

thanks

[Re-Titled by Moderator]

iMac 21.5", macOS 10.12

Posted on Feb 16, 2020 1:06 PM

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Grant Bennet-Alder

Level 10

133,021 points

Feb 16, 2020 1:13 PM in response to gavalaar_82

This article (now "archived") spells out the conditions and methods of using Target Display Mode.

Use your iMac as a display with target display mode - Apple Support

"Target display mode requires macOS High Sierra or earlier [on the iMac]. It does not work with macOS Mojave or later"

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I have a MacBook Pro 2017 and a iMac 21.5" mid 2011, I would like to use the old iMac as a 2nd monitor

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