Compiling on macOS using MacPorts

Installing GRASS GIS with MacPorts

MacPorts is a package management system for macOS. It makes it easy to install and update any supported software — dependencies (that can be either executables or libraries) are installed and updated automatically. It is recommended to install the MacPort base software with the package installer available at macports.org where also detailed installation and usage instructions can be found. Note that Xcode is a prerequisite and that MacPorts is controlled through the Terminal with the port command.

Assuming you succeeded with the installation of the MacPorts base, the base software can be updated with:

sudo port selfupdate

Information on software, i.e. ports, that can be installed can be retrieved with the info action, this is an example with the port grass (which is the latest version):

port info grass

grass @8.3.0_4 (gis)
Variants:             debug, debugoptimized, gui, mysql57, mysql8, openblas,
                      openmpi, postgresql10, postgresql11, postgresql12,
                      postgresql13, postgresql14, [+]postgresql15, proj6, proj7,
                      proj8, [+]proj9, python310, [+]python311, python37,
                      python38, python39, universal

Description:          GRASS is a Geographic Information System (GIS) used for
                      geospatial data management and analysis.
Homepage:             https://grass.osgeo.org/

Build Dependencies:   pkgconfig
Library Dependencies: bzip2, freetype, fftw-3, gdal, pdal, geos, tiff, libpng,
                      liblas, cairo, zlib, sqlite3, readline, python311,
                      py311-Pillow, py311-numpy, py311-six, proj9, postgresql15
Runtime Dependencies: py311-psycopg2
Platforms:            darwin
License:              GPL-2+
Maintainers:          Email: n_larsson yahoo com, GitHub: nilason
                      Policy: openmaintainer

The variants are options for a port that can be chosen at installation. The variants marked with a +, are included by default.

Installing GRASS with default variants:

sudo port install grass

will download, compile and install GRASS with dependencies postgresql15, proj9 and python311.

However, a customized installation may look like:

sudo port install grass +gui +python39

which will replace the default python311 with python39 and include also the gui dependency. The default variants postgresql14 and proj8 will in this case also be included.

Note: you need to add +gui to install wxPython for GRASS graphical user interface, this in not included by default.

To check if any of the installed ports (or dependencies) have been updated:

sudo port selfupdate
port outdated

To update outdated ports:

sudo port upgrade outdated

Using GRASS GIS installed with MacPorts

A standard installation of MacPorts will install ports at:

/opt/local/

Installation with the variant +gui will also install an app bundle at:

/Applications/MacPorts/GRASS-8.3.app

You can start GRASS GIS from terminal with command:

grass

or

/opt/local/bin/grass