macOS 10.14.6 (Mojave)
Grass installed via osgeo4mac, osgeo-grass, v7.6.1
link2GI::searchGRASSX()
[1] FALSE
Warning message:
In system2("find", paste(MP, " ! -readable -prune -o -type f -executable -iname 'grass??' -print"), :
running command ''find' /usr ! -readable -prune -o -type f -executable -iname 'grass??' -print 2>/dev/null' had status 1