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GRASS 7.8.8 release candidate 3 was posted last month
GRASS 8.2.1 release candidate was posted today


Hi, I am experiencing problem with georeferencing scanned maps. After setting GCPs in XY location I can't reproject the data into coordinate location because system message appears saying "Please select a valid location and mapset to continue" as on attached screenshot.

I would attach a screenshot, but the system doesn't allow me to do so.

I am using macOS Monterey 12.4 and Grass 8.2.0, but I get this error also with Grass 8.0.2 and 7.8.6

Georeferencing doesn't work by pawleeqpawleeq, 02 Jul 2022 09:55

Clicking on "download" in
GRASS 8.2.0 6 Jun 2022 download
results in error "403. That’s an error. We're sorry, but you do not have access to this page. That’s all we know."

Download of 8.0.2 works normally.

GRASS 8.2 was released a few days ago. I just now posted new binaries.

GRASS 8.2 binaries posted by cmbarton54cmbarton54, 06 Jun 2022 18:35

I just posted new development versions (release candidates) for GRASS 8.2.0 RC2 and 7.8.8 RC1. Please download and test.

I also did a little bit of updating and reorganization of the site to make downloads easier.

Announcing a new series of publicly available YouTube video tutorials for GRASS 8. These tutorials, originally created for a GIS course at San Diego State University titled “ANTH 562 Computational Archaeology”, are aimed to help novice to advanced GIS practioners learn how to use GRASS GIS. The subject matter is nominally archaeological GIS, but all the basics of GRASS are covered, as well as some advanced topics, such as Least Cost Analysis, Visibility Analysis, Hydrological Modeling, Terrain Analysis, and more. The sample data used in the tutorials is available in this GitHub repository.

The tutorials will be added to this YouTube playlist.

See announcement at:

The GRASS team just released v. 8.0.2. This is a maintenance release but has a number of fixes and updates. You can read about them at:

GRASS 8.0.2 released by cmbarton54cmbarton54, 12 May 2022 22:07

The GRASS team just released v. 8.0.2. This is a maintenance release but has a number of fixes and updates. You can read about them at:

GRASS 8.0.2 released by cmbarton54cmbarton54, 12 May 2022 22:06

GRASS 8.0.0 was released at the end of January. It's taken me a couple weeks to get it compiled. It has a significantly updated interface for selecting maps-from a data catalog environment that lets you choose all map types and easily switch between locations and mapsets.

Also numerous new features and bug fixes. Read about it at and at

GRASS 8 is here! by cmbarton54cmbarton54, 14 Feb 2022 21:46

Happy New Year to GRASS users.

In 2022, GRASS is moving to create a new stable release of version 8. This is a major update to GRASS, involving its GUI interface and underlying modules. Keep in mind that a full version update may not be backward compatible with older versions (though this one is backward compatible with most older GRASS functions and commands. I've posted the first formal release candidate.

I also posted a slight update to the version 7.8.6 binary. This binary does not require you to install a separate X11 application (it is not used in GRASS for Mac anyway).


Hi I am trying to run a gapfilling python script from PySEBAL that uses GRASS with the terminal command. I have already installed grass_session with the pip command using Anaconda.

I have tried using the LINUX and Windows environmental variable and run the program
export GRASS_BIN="/Applications/

Windows adjusted to the mac
export GRASSBASE="/Applications/
export GISRC="/Applications/"
export PATH="/Applications/"

However, when I run the script, it can't find grass_session because there is no link between Anaconda and GRASS.

Any help someone can provide would greatly be appreciated since I have spent a couple of days going no where. Thanks.

Kind Regards,


I forgot to post here that I posted binaries for the new GRASS 7.8.6 stable and 8.0 development version a few weeks ago (21 October 2021). Take them for a spin.

I just compiled and uploaded new binaries for the upcoming GRASS stable version (7.8.6 release candidate 2) and the tech preview for the next generation GRASS (v. 8). Enjoy!

GRASS 8 is now available as advance tech preview. Many new features, including the new data catalog. Enjoy!

I forgot to change the sharing permissions yesterday afternoon. Anyone should be able to download this app now.

You can now run GRASS 7.8.6 with the latest bug fixes and enhancements.


I'd be grateful for some guidance setting up the OSX 7.9 binary with command line access. The goal is to interact with location/mapset via the python grass-script library.

Thanks in advance for any suggestions.


I just compiled and posted new Mac binaries for current GRASS 7.8 (7.8.6 development release with bug fixes) and advanced technology version 7.9. Both contain important fixes for custom location creation. They are compiled with libLAS support (thanks to Nicklas Larsson and Anaconda). This enables the full suite of GRASS LiDAR processing tools. There are also a number of other bug fixes, including better functioning log scaling in color tables and legends, as well as more new features in 7.9.


The new binaries for GRASS 7.9 and 7.8.6 have fixes for v.colors (working increasingly well) and the supervised classification tool for multi-band satellite imagery. There are other fixes and enhancements too of course.

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