  We consider a minimal natural supersymmetric model based on an extra
dimension with supersymmetry breaking provided by the Scherk-Schwarz mechanism.
The lightest supersymmetric particle is a neutral, quasi-Dirac Higgsino and,
unlike in previous studies, we assume that all Standard Model fields are
propagating in the bulk. The resulting setup is minimal, as neither extra
matter, effective operators, nor extra $U(1)$ groups are needed in order to be
viable. The model has three free parameters which are fixed by the Higgsino
mass -- set to the range 1.1-1.2 TeV so it can play the role of Dark Matter,
and by the requirements of correct electroweak breaking and the mass of the
Higgs. After imposing the previous conditions we find a benchmark scenario that
passes all experimental constrains with an allowed range for the supersymmetric
parameters. In particular we have found gluinos in the range 2.0-2.1 TeV mass,
electroweakinos and sleptons almost degenerate in the range 1.7-1.9 TeV and
squarks degenerate in the range 1.9-2.0 TeV. The best discovery prospects are:
i.) gluino detection at the high luminosity LHC ($\gtrsim 3\, \text{ab}^{-1}$),
and ii.) Higgsino detection at next-generation dark matter direct detection
experiments. The model is natural, as the fine-tuning for the fixed values of
the parameters is moderate mainly because supersymmetry breaking parameters
contribute linearly to the Higgs mass parameter, rather than quadratically as
in most models.
