2.2. MfiX Installation on Mac

As of this release, MFiX has been tested on the latest version of MacOS at the time of this release, 10.14 (Mojave). Earlier of MacOS are likely to work. If you have an issue running MFiX on your Mac, ask for help at Support Forum.

2.2.1. Install Anaconda

Download the Python 3, Mac version of Anaconda (~500 MB download) or Miniconda (~50 MB download). Either the Graphical Installer or Command Line Installer would work.

For instance, with the Anaconda Graphical Installer:

  1. Open up Finder and navigate to the Download directory.

  2. Double-click the downloaded file. (At the time of this writing, it would be Anaconda3-2019.03-MacOSX-x86_64.pkg for Graphical Installer).

  3. Follow the installation guide, using the default settings.

2.2.2. Install MFiX

After installing Anaconda, install MFiX:

  1. Open a Terminal (Type “⌘-Spacebar”, type “terminal”)

  2. Browse to MFiX Download (requires registration and login)

  3. Copy the conda command

  4. Paste it in the Terminal.


If you already installed MFiX, you may see the following message. Select y to confirm.

WARNING: A conda environment already exists
Remove existing environment (y/[n])? y

MFiX will be installed in a new conda environment. The process will take a few minutes to complete.

2.2.3. Install Solver Build Dependencies (optional)

Build dependencies are needed for building a Custom Solver. If you only use the default solver binary package, you can skip this step.

Building the MFiX solver requires:

  • Fortran 2003 compiler (GFortran 4.8 or later)

  • GNU Make

  • CMake

  • For DMP support, an MPI implementation (such as OpenMPI)

For building with other compilers, or for building with DMP, see Building Custom Interactive Solver.

Homebrew is the recommended way to install MFiX build dependencies. Go to the Homebrew website and follow the installation instructions.

Once Homebrew is installed, install the build dependencies:

  1. Open a Terminal (Type “⌘-Spacebar”, type “terminal”)

  2. Run brew install gcc boost open-mpi

2.2.4. Run MFiX

Open Terminal (if not open already), and run the following commands:

  1. Run conda activate mfix-20.1

  2. Run mfix⏎


If you are using a shell different from bash, switch to bash before running conda activate

Your prompt should look something like this:

> conda env list
# conda environments:
base        *  /Users/user/anaconda3
mfix-20.1      /Users/user/anaconda3/envs/mfix-20.1

> conda activate mfix-20.1
(mfix-20.1) > conda env list
# conda environments:
base           /Users/user/anaconda3
mfix-20.1   *  /Users/user/anaconda3/envs/mfix-20.1

(mfix-20.1) > mfix

You are now ready to proceed to the First Tutorial and Tutorials.


Activating a conda environment sets certain environment variables such as PATH in the current shell. It does not create a new shell session.

You will need to activate the environment every time before running MFiX.

2.2.5. Deactivate Conda Environment

After using MFiX you can just exit to leave the Terminal session. However, if you need to deactivate the mfix-20.1 conda environment, you can do so with:

(mfix-20.1)> deactivate

This returns to the base conda environment.

2.2.6. Uninstall MFiX

To uninstall MFiX from a conda environment:

(mfix-20.1)> conda uninstall mfix

To remove the conda environment (if you have the environment activated, deactivate it first):

(mfix-20.1)> conda deactivate
> conda env remove -n mfix-20.1

To uninstall Anaconda entirely, remove the Anaconda directory. By default, ~/anaconda3 in your home directory. From the Terminal:

> cd ~
> rm -rf anaconda3/


To learn more about managing conda environments, visit the conda documentation .