Target Display Mode Assistance Required Please

[Karlos879]

I am attempting to set up target display with my iMac, but I'm having all sorts of trouble doing it....and I'm in need of some assistance...

My setup:

Master - 27" Late 2012 iMac Model ID 13,2 running High Sierra 10.13.6

2nd display - 27" Mid 2010 iMac Model ID 11,3 running El Capitan 10.11.6

I have both a Thunderbolt 2 cable and a DisplayPort cable, but neither will work for me.

I would love some help here please if anyone knows what I'm doing wrong?! Thanks.

 

[hg.wells]

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

Target display mode is a feature available with certain older Mac models.

support.apple.com

Are you turning on Target Display mode on the iMacs first?

 

[Karlos879]

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

Target display mode is a feature available with certain older Mac models.

support.apple.com

Are you turning on Target Display mode on the iMacs first?

I was following the procedure here:

Use your iMac as a display with target display mode – Apple Support (AU)

Target display mode is a feature available with certain older Mac models.

support.apple.com

 

[hg.wells]

Looks like you’re need a USB adapter for mini-display port for the 2nd iMac as your 2012 iMac doesn’t have a mini display port.

Adapters for the Thunderbolt or USB-C port on your Mac - Apple Support

Learn about different adapters for the Thunderbolt 5, Thunderbolt 4, Thunderbolt 3, or USB-C port on your Mac.

support.apple.com