Unfortunately Apple decided to not build vPro platforms.
There is Intel ME FW component of vPro Platform. For vPro it has to be Enterprise FW (5/6 MB) while for consumer platforms it is basic ME FW 1,5/2 MB image that do not support IPT PKI neither vPro/AMT.
Intel IPT PKI SW does not support OS X as well.
Sorry.
darek