  MAROON-X is a red-optical, high precision radial velocity spectrograph
currently nearing completion and undergoing extensive performance testing at
the University of Chicago. The instrument is scheduled to be installed at
Gemini North in the first quarter of 2019. MAROON-X will be the only RV
spectrograph on a large telescope with full access by the entire US community.
In these proceedings we discuss the latest addition of the red wavelength arm
and the two science grade detector systems, as well as the design and
construction of the telescope front end. We also present results from ongoing
RV stability tests in the lab. First results indicate that MAROON-X can be
calibrated at the sub-m/s level, and perhaps even much better than that using a
simultaneous reference approach.
