i think they all run OS X up to a certain point.
anything with gma 950 or x3100 graphics can only run up to lion and only 32 bit kernel mode.
the d630 nvidia runs latest os Herve has a tested boot pack for that.
the E6400 might be hit or miss if it uses eDP connection to the lcd then most likely it will not work. i am not sure if GMA or nvidia is a better selection. optimus might also be a factor.
as for the desktops i guess it would first depend on cpu, (core 2 duo and up) then what graphics it has installed if it is compatible with OS X.
once you get one working it is a lot easier to get the rest going