GRASS Software: Stable Releases

Version Date Download Link Configuration Info
GRASS 8.3.2 Apple ARM 28 Mar 2024 download download
GRASS 8.3.2 Intel 28 Mar 2024 download download
GRASS 7.8.8 Apple ARM 1 Mar 2024 download download
GRASS 7.8.8 Intel 14 Aug 2023 download download

GRASS Software: Preview Releases

Version Date Download Link Configuration Info
GRASS 8.4dev Apple ARM 1 Mar 2024 download download
GRASS 8.4dev Intel 1 Mar 2024 download download
GRASS 8.40RC1 Apple ARM 22 Jun 2024 download download
GRASS 8.40RC1 Intel 22 Jun 2024 download download

Features of Note

New Native Support for Apple ARM Processors Thanks again to Nicklas Larsson for updating his build scripts to support the new, fast Apple ARM processors. Current versions to support prior Intel processors are also available.

All Dependencies Included
These GRASS apps are packaged with all needed dependencies, which are detailed in an accompanying configuration info file. They include correct versions of Python and wxPython to run: Python 3 and wxPython 4 for GRASS versions 7.8 and higher, and Python 2.7 and wxPython v3 or 4 for earlier versions. Hopefully this will avoid any conflicts with other versions of GRASS dependencies you may have intentionally or inadvertently installed with other apps, and will run without needing to disable OS X System Integrity Protection.

Mac OS X support
The ARM versions were built for MacOS 11 and the Intel versions were built for macOS 10.13. I don’t know if older Mac OS versions will run this app, but they might–at least for the Intel version.

International Language Support
These versions of GRASS are compiled with international support for multiple languages (gettext).

LiDAR Processing Support
Versions 7.8.6dev and higher are now compiled with libLAS so that all GRASS LiDAR processing tools work within the GRASS environment. PDAL support is catching up in GRASS 8.

GRASS versions 7.8.3 and above are compiled with PDAL library support for reading and manipulating LAS LiDAR files within GRASS. For some reason, the input module ( does not show up in the menus in GRASS 7 (it does in GRASS 8). You’ll have to run it from the terminal or console Command line PDAL tools can also be run from the GRASS terminal. I also have bundled the LAStools command line utilities which you can run from the command line. These utility programs allow you to read/write LAS (lasinfo, las2las, las2txt, txt2las) and LAZip files (laszip), do filtering and processing (lasdiff, lasindex, lasmerge, lasprecision), and translate them into csv formats that GRASS can read (las2txt).

Advanced Features in GRASS 8
GRASS 8 now includes a new data catalog window that provides a much easier way to manage and access GRASS data directories, locations, and maps. This is a major enhancement in usability. Note that it will not recognize your GRASS 7 configuration files and you’ll have to respecify your database and any other preferences.
(Alert If you happen to have a filename of a 2D or 3D map with the “@” symbol, the data catalog will fail and only partly open at start up, but there is no error message).

GRASS 8.3 has a new single window GUI interface. This is the most significant change in the GUI since GRASS 6. It is nicely organized, with all GRASS features as panes within a single window that you can place and resize on the desktop. If you like the look of QGIS or ArcGIS, or regularly use Linux or Windows, this may be just the thing for you. If you prefer the older, more Mac-like multi-window interface, you return to that by unchecking the box for the single window mode in preferences/appearance and closing/restarting the GUI (type g.gui from the terminal after closing the GUI).

Installing GRASS for Mac

  1. Download and unzip the *.dmg installation package
  2. Drag the GRASS app to your /Applications folder (it will not work properly in any other folder)

Installation tips

Installation location
These new fully bundled binaries MUST be installed and run from the /Applications folder. They will not run from another folder or even a subfolder of /Applications. This has to do with the build environment. If this changes, I’ll note it here.

First time launch of a GRASS app
Current stable and preview versions of GRASS should launch without any special permissions issues (see below). Sometimes it seems to take a long time to open the app the first time (this seems kind of random). So be patient and look for the little dialog box that asks you if GRASS can control your terminal–answer yes. After the first time, each app should open quickly and without issue.

Because I do not have permission to authenticate (“sign”) Mac apps, older version of these binaries may fail Apple’s verification test. To run them, you may need to control-click the app and select “open” the first time you run an app you have downloaded. After verification fails, you will be given the option to “open” the app anyway. You only have to do this once for each app or version you download. I and others have noticed that after doing this, the app may close and you will have to double click it again, and it may take some time to launch initially. After the first time, each app should open quickly and without issue.

Installing GRASS extensions
Extensions written in pure Python will install without any problems. If an extension is in a language that needs to be compiled (e.g., C or C++), you must have Apple’s Command Line Tools installed. You can do this in a couple of ways.

  1. You can install the full Xcode package (quite large). Once it opens, install the Developer Command Line tools from the Xcode menu.
  2. You can just install the Command Line Tools from the terminal, without installing the full Xcode package. Launch a terminal window (The terminal app is found in the /Applications/Utilities folder). Type the following, followed by a return.
xcode-select --install

The next time you launch GRASS, you should be able to install and compile any extension.

Please report any bugs in the GRASS issue tracker.

Legacy GRASS apps

will not be further updated

These releases require you to have installed needed frameworks (AKA dependencies or helper programs) before installing GRASS for the first time. Check the frameworks page to make sure you have the appropriate framework versions.

Legacy GRASS binaries from this site may not work with OS X 10.11 (El Capitan) and above unless you disable “System Integrity Protection”. A workaround to allow GRASS to run is provided below.

Selected legacy binaries for OSX 10.8+

These versions of GRASS are compiled with international support (gettext) and LiDAR (LASlib and tools) support. As far as I can tell, they work with Mac OS X version 10.8 (AKA “Lion”) and above if System Integrity Protection is disabled.

Version Date Download Link
GRASS 7.6.2 64bit wxPython 3 8 Aug 2018 download
GRASS 7.3 64bit wxPython 3 13 June 2016 download
GRASS 7.3 development 14 Sept 2016 download
GRASS 7.2 development 14 Sept 2016 download
GRASS 7.0.5 stable 3 Oct 2016 download
GRASS 6.4.6 svn 28 Apr 2016 download

Selected legacy binaries for OSX 10.6+

These even older binaries for 10.6 seem to also run well with 10.8 and maybe above. However, they are based on system Python 2.5 and 2.6.

Version Date Download Link
GRASS 7.0 dev 1 November 2013 download
GRASS 6.5 dev 31 October 2013 download
GRASS 6.4.3 stable 30 July 2013 download

Binary archive (GRASS 6.4.3-current)

An archive of all GRASS binaries I’ve compiled for the Mac can be found on the OSGEO server for GRASS for Mac binaries

Known bugs in legacy versions

There are several known bugs to watch out for that affect the GUI:

  1. The Wizard to create a custom location (projection/CRC) was broken in version 7.8.5. It is fixed in 7.8.6 and above. Other methods of creating a location work.
  2. The digitizer module and the interactive supervised classification module (for satellite imagery) were unstable and crashed the GUI in older versions. You would need to restart the GUI by typing ‘g.gui’ into the terminal and hitting return. The raster digitizer was now working well in GRASS 7.5 but the vector digitizer was still broken. All is now fixed in GRASS 7.8 and above.
  3. In GRASS 7.2.2, a few drop down controls (entry widgets) did not recognize mouse clicks. You need to use your arrow keys or type the entry for them to work. This is fixed in the later versions of GRASS.
  4. In GRASS 7.2.2, when switching back from the 3D interface to the 2D interface, one of the 3D window control buttons (for fly through) will overwrite one of the 2D menu buttons (zoom to max). If you click this overwritten button, the GUI will crash and you will have to restart it (see #1). This is fixed in the later versions of GRASS.

Installing and running legacy binaries

2-step installation of legacy GRASS binaries for the Mac

  1. You need to download and install some helper programs, called frameworks (the same as “dependencies” on Linux systems). I’ve provided these as compiled packages on the frameworks page. William Kyngesburye compiled these frameworks and also has a page with legacy frameworks. You can find the latest versions there. Be advised that the newest versions of these frameworks may not work with older legacy GRASS binaries. This is one of the reasons I switched to fully packaged apps with all such dependencies included.
  2. Then you just need to download one of the GRASS binaries above. Each downloaded app comes as a compressed disk image (*.zip expanded to *.pkg). You just double click and follow the instructions. Although these binaries automatically install directly into the Mac Applications folder, you can move them to another folder of your choice.

How to alter system settings in OS X 10.11 (El Capitan) and newer so that older GRASS binaries will run
This is a work around that seems to allow you to run GRASS on a Mac after upgrading to the new Apple OS. It involves disabling a new System Integrity Protection feature. This reduces security of your system to the level it was before the El Capitan OS X release.

  1. Restart your Mac in Recovery Mode. To do this, choose Restart from the Apple menu, and as soon as the screen turns black hold down Command + R on the keyboard until the Apple logo appears on your screen.
  2. Select Terminal from the Utilities menu.
  3. In the Terminal Window that opens type: csrutil disable
  4. Press the Return key.
  5. Choose Restart from the Apple menu.

To reenable System Integrity Protection, follow the above steps but in the terminal, type: csrutil enable

Some people may need to reinstall frameworks for GRASS to run. For others, this is not necessary