MacMillan modern black tartan

[MacMillan of Rathdown]

And so the difference is more obvious, she is wearing the recognized MacMillan, I'm in the "black"

Glad to hear you are "in the black"; I'm still operating "in the red" since moving back to the 'States.

If you are referring to the attractive lady in the sun glasses, she seems to be wearing a sort of fashion tartan based on Macmillan Hunting. The horizontal yellow lines seem to be some sort "woven" or interlaced design, that do not match the vertical yellow stripes in her skirt. Attractive? Yes, but it's not Macmillan Hunting tartan.

This photo really shows the difference between Ancient MacMillan and "Black MacMillan", with just a dash of "Loud MacLeod"
in the background. The "Clan MacMillan Society of Glasgow" tartan "squares the sett" of Macmillan Ancient (making it easier to make into a kilt, which is why it was invented in the first instance) and the result is similar to "Black Mac".