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GRASS GIS, commonly referred to as GRASS (Geographic Resources Analysis Support System), is a Geographic Information System (GIS) used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies.

What's New

Version 6.4.3-130729:
  • Assistance for topologically unclean vector data
  • Major speedup for some vector modules
  • Fixes in the vector network modules
  • Fixes for the wxPython based portable graphical interface
  • New modules have been added for processing LANDSAT and MODIS satellite data
  • New vector statistics module
  • Many new symbols and north arrows more...


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GRASS GIS User Discussion

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PorkPieHat Member IconComment+0

Before I dive in, how does this run on Lion? Any opinions about whether I need more than 2 or 3 GB of RAM, and will it run reasonably on my late-2006 2.16 GHz iMac? And, though it appears to be an OS X port, I just want to be sure: It’s not Java, is it?

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Version 6.4.1-5
Negritude Member IconComment+1082

The requirements listed are incomplete. There are several support frameworks that have to be installed before installing GRASS. Go to the developer's web site for the full scoop.

Also, the latest version for 10.5 is available, and it's a universal Intel/PPC binary:


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Version 6.4.1-1
Orion-Mk.-V Member IconComment+216

Link to developer site incorrect. The Mac version looks like it's here:


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Version 6.4.1RC1-110227
Anonymous Member IconReview

Thanks to the new mirrors - good speeds. And thank you, Lorenzo Moretti, for your hard work and your patience with all the negative comments.

GRASS itself is powerful and this distribution makes installation a snap. Good work!

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Version 040630
Anonymous Member IconReview

1st - Give the developer a break. It's free and it is big. He does not host it on a big fast server - so what IT IS FREE. If you think you can do better, contact the developer, I am sure he would be more than willing to mirror his 100's MB of files on your free server.

2nd - Note this is an OSX port of the newer beta version of Grass including a menu driven interface and a GUI. There is an OSX version of the current release of Grass but it only has a command line interface and it will cost you a few $100. The fact that someone is porting the latest and greatest to OSX is GREAT!!!!

3rd - Grass in not for the casual user. It is very powerful but it is not trival. If you haven't used it before, plan on spending days (if not weeks) on coming up to speed.

4th - It requires X11. I am running it under 10.2.8 so I am using the old beta release of X11 (that does not require 10.3). There are some stability problems but it is not clear if this is a Grass issue or the fact that I am not using the most up to date version of X11.

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Version 040320
Anonymous Member Icon

All the developer needs to do is submit it to the MIT HyperArchive which has been around forever, no self-respecting Mac user should be unaware of this resource...

problem solved.

user icon+1
Version 6.4.1-5
> 5 3


Current Version (6.x)


Downloads 29,253
Version Downloads 858
License Free
Date 15 Aug 2013
Platform Intel 64 / OS X / Intel 32
Price Free
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