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levetts Author

Level 1

4 points

Target display mode

Hi,

I have a MacBook Pro (15-inch, 2017) which I'd like to use as an external monitor, i.e target display mode. The iMac is a 27 Inch later, 2013 model. Both are running Catalina 10.15.4.

I have a Thunderbolt 1 to Thunderbolt 3 cable attached between the 2 but I can't get the macbook to "see" to external iMac. The command-f2 doesn't work and I'm never presented with the iMac as an external monitor.

Does anyone know exactly what cable I would need to use target display mode between these 2 machines.

Thanks in advance.

Posted on May 15, 2020 9:57 AM

Top-ranking reply

Androish

Level 8

39,487 points

Posted on May 15, 2020 10:04 AM

You can't use a mac with catalina in target display mode.

The iMac you want to use as a screen must be running High Sierra or earlier, and meet the rest of the requirements:

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

Good luck!

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Target display mode

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