library(JuliaCall)
julia_setup()
Julia version 1.0.0 at location /Applications/Julia-1.0.app/Contents/Resources/julia/bin will be used. Loading setup script for JuliaCall... Finish loading setup script for JuliaCall.
julia_console()
It seems that you are not in the terminal. A simple julia console will be started. Type exit and then enter to exit.
julia> sqrt(2)
julia> exit
Exiting julia console.
julia_library("Plots")
julia_command("gr()")
julia_command("Plots.plot(Plots.fakedata(50,5),w=3)")