Board Thread:Theories and Speculation/@comment-33485854-20180625233306/@comment-33286580-20180626033326

Sage Paths Six Mode is the power of the Jubi Jinchuriki alone. only those that have become Jubi Jinchuriki or pseudo Jubi Jinchuriki can achieve SPSM.

the only ones who achieved SPSM are Kaguya, Hagoromo, Madara, Obito and Naruto.

SPSM is activated essentially when the Jubi chakra is used. in Naruto's case he accesses the powers of all the Biju within him.

Edit...

it has nothing to do with Six Paths chakra. Six Paths chakra is the power flowing through the Otstsuki clan and its descendents. either by consuming the Chakra fruit or they simply had it from birth, i lean to the latter, because Chakra fruit is only a source for temporary power, longetivity and youth for them as per Momo.

Also the fact that in the final fight with Sasuke Naruto could use Senjutsu alongside SPSM means the power is not Senjutsu. it is the power of the Jubi or Shinju. Since Jubi is all Natural energy has such it is confused as Senjutsu.

Further edit...

just so i make my point clear...

the biju are formed from the chakra of the Jubi. the Jubi is natural energy, so in that sense the biju too are made of natural energy, but we dont say that Jinchuriki using their power make them capable of using Senjutsu.

the Biju took the chakra and became a seperate entity.

similarly even though the Jubi is made of Natural Energy, it is an existence different from Nature. it made the Natural Energy its own. this natural energy became its own chakra.

it is accessing this chakra that Naruto or other Jubi Jinchuriki attain SPSM.