[Qgis-user] problems with QGIS 3 functionality - grass doesn't work well

[massimiliano crea]

Hi everyone, I have a mac with mac osx mojave and I installed qgis 3.4.4 and python 3.6.8. Working with the grass when I dem out of the contour lines the result is flat: with qgis 3d map I see a flat profile. I have verified on the terminal that the recognized python is 2.7. Could this be the problem with grass malfunctioning? How can I solve it? 
Thank you
Massimiliano Crea
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