We are wanting to connect the Macbook Pro my wife uses for work to our new 21.5" 1080p model of iMac. I know they discontinued Target Display Mode for at least the Retina models. Can anyone confirm they did for the low end screen as well? No websites or discussions talk about any of the late 2015 models as having support for this feature...but I also only see posts saying that for the Retina models, it is not supported. I could buy a Thunderbolt cable and check for myself, but I thought I would source the community here first before buying a cable we do not need at the moment. Thanks!