mnosshi

installing MODIStsp requires many dependencies: 
library(RGtk2; rgdal; cairo; sp; bitops; data.table; gdalUtils; hash; gWidgets; rgeos; xts; XML; xml2; stringr; httr; RJSONIO; chron; iterators; digest; pacman; curl) 
and for MAC OSX sierra, there are two main issues:
1. As outlined here in the comment by @tobybot11 (https://gist.github.com/sebkopf/9405675) Rgtk requires the x11 libraries/headers (gdk/gdkx.h specifically)
and doesn't work with the quartz libraries/headers which now is the default for GTK
2. When installing the dependencies gWidgetsRGtk2 and cairoDevice from CRAN you need to choose the version "OS X Mavericks binaries" 
and not "Package source"

To start, update to the recent R package, then update packages
#1. update packages