Installing KNITRO in MacOS

Shuvomoy Das Gupta

June 6, 2022

In this blog, we will discuss how to install KNITRO in MacOS. First, unzip the KNITRO.zip file by following the instructions here. Then copy the unzipped folder to your home directory. Location of the home directory can be found by pressing Command+Shift+H in finder.

After that, run the following commands in terminal (.zsh).

nano ~/.zshrc

This will open the .zshrc file in terminal. Add the following two lines in the file. (Keep in mind that the precise location will vary from user to user.)

export PATH="/Users/shuvomoy_das_gupta/knitro-13.0.1-MacOS-64/knitroampl:$PATH"

export DYLD_LIBRARY_PATH="/Users/shuvomoy_das_gupta/knitro-13.0.1-MacOS-64/lib:$DYLD_LIBRARY_PATH$"

Now press Ctrl+O to save and the press Enter to confirm the save. Then, quit nano by pressing Ctrl+X.

Now, source the .zshrc file by entering

source ~/.zshrc

in terminal.

Check if the path and library path has been loaded properly by running the following in the terminal.

echo $PATH

echo $DYLD_LIBRARY_PATH

Copy the license file to the home folder.

While installing KNITRO.jl in Julia, if you have any library problem, then add the following lines in the deps.jl file located in KNITRO/BuildNumber/deps/.

const libknitro = "/Users/shuvomoy_das_gupta/knitro-13.0.1-MacOS-64/lib/libknitro.dylib"
const amplexe = "/Users/shuvomoy_das_gupta/knitro-13.0.1-MacOS-64/knitroampl"