Cable to use on old iMac as second display

[nickyj182]

I’ll make it short and sweet!

My primary iMac is a 2019 21.5” 4K

I also have a Mid 2011 27.5” iMac that I would like to use as a second display

What cable will I need to make this work? Thanks in advance!

 

[CoastalOR]

I’ll make it short and sweet!

My primary iMac is a 2019 21.5” 4K

I also have a Mid 2011 27.5” iMac that I would like to use as a second display

What cable will I need to make this work? Thanks in advance!

It looks like you will need a Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter and a Thunderbolt 1/2 cable.

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

Some older Mac models can use older iMac models as an external display.

support.apple.com