  We report on the performance of a vector apodizing phase plate coronagraph
that operates over a wavelength range of $2-5 \mu$m and is installed in
MagAO/Clio2 at the 6.5 m Magellan Clay telescope at Las Campanas Observatory,
Chile. The coronagraph manipulates the phase in the pupil to produce three
beams yielding two coronagraphic point-spread functions (PSFs) and one faint
leakage PSF. The phase pattern is imposed through the inherently achromatic
geometric phase, enabled by liquid crystal technology and polarization
techniques. The coronagraphic optic is manufactured using a direct-write
technique for precise control of the liquid crystal pattern, and multitwist
retarders for achromatization. By integrating a linear phase ramp to the
coronagraphic phase pattern, two separated coronagraphic PSFs are created with
a single pupil-plane optic, which makes it robust and easy to install in
existing telescopes. The two coronagraphic PSFs contain a 180$^\circ$ dark hole
on each side of a star, and these complementary copies of the star are used to
correct the seeing halo close to the star. To characterize the coronagraph, we
collected a dataset of a bright ($m_L=0-1$) nearby star with $\sim$1.5 hr of
observing time. By rotating and optimally scaling one PSF and subtracting it
from the other PSF, we see a contrast improvement by 1.46 magnitudes at $3.5
\lambda/D$. With regular angular differential imaging at 3.9 $\mu$m, the MagAO
vector apodizing phase plate coronagraph delivers a $5\sigma\ \Delta$ mag
contrast of 8.3 ($=10^{-3.3}$) at 2 $\lambda/D$ and 12.2 ($=10^{-4.8}$) at $3.5
\lambda/D$.
