I use mac and when I try to use grass modules in qgis (brighton) I get a "cannot find module" message.
He uses a Mac. For the procedure, look at Configuring external applications.
Check the path in Processing/Toolbox/Options/Providers/GRASS...
- If you use the KyngChaos version, there is a GRASS GIS 6.x version integrated in the QGIS application bundle and the path is
- if you want to use another version of GRASS GIS, adapt the path, for example
/Applications/GRASS-6.4.app/Contents/MacOSfor GRASS 6.x and
/Applications/GRASS/GRASS-7.x.app/Contents/MacOSfor GRASS 7
If you use another version of QGIS (Homebrew, MacPorts, ...), it is the same thing