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viapotapov Author

Level 1

4 points

Target display mode not working

Hi,

I have a iMac 21.5 late 2012 on macOS Catalina 10.15.7

and a MacBook Air M1 on Ventura 13.5.2

And I try to use my iMac as an external monitor by target display mode.

I've connected them via thunderbolt: iMac - thunderbolt 2 cable - thunderbolt 3 to 2 adapter - MacBook

I press command+F2 on iMac and nothing happens. I press Fn+command+F2 on iMacand nothing happens.

Or rather my iMac makes a beep. I had check success connection in system information.app. Each Mac see the other Mac in the Thunderbolt tab of System Information.app. I have press command+F2 and Fn+command+F2 but nothing still works.

Thanks.

iMac 21.5″, macOS 10.15

Posted on Oct 3, 2023 10:32 AM

Top-ranking reply

den.thed

Level 10

82,540 points

Posted on Oct 3, 2023 10:37 AM

The M1 MacBook Air does not support using the iMac as a display in Target Display Mode.

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

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Target display mode not working

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