pythonqgis
I downloaded QGIS version 3.2 and (I think) followed the install directions correctly: first I installed Python 3.6 from the Python website, then I installed GDAL, but when I install QGIS I get the errors mentioned elsewhere in the forum, "QGIS requires Python 3.6". From reading other posts, it seems like installing Python directly from the Python website was the solution to others with the same error – this may have corrected incorrect paths.
Any thoughts on what else I can try?
1) Yosemite comes with 2 versions of Python installed by default:
Python 2.7 (default), in the Terminal.app, type python and
Python 2.6, in the Terminal.app, type python2.6 and
The Kyng Chaos QGIS version uses /usr/bin/python and no other versions of Python (you can install other versions of Python if you want, 3.5 for examples)
2) To install a Python module, you need to know the Python "ecosystem", independent of the OS ("but most instructions seem to be for PC" is not relevant here.) -> look at New in How can I install pyproj into arcpy?
For example to install the xlrd module, go the Python Package Index (Pypi) and
Download xlrd-0.9.4.tar.gz, unzip/tar and open Terminal.app in the unzipped folder then
python setup.py install (you need sudo python setup.py install because the folder /Library/Python/2.7/site-packages is protected)
or
python2.6 setup.py install (same)
The new way of installing modules is
easy_install xlrd (with setuptools)
or
pip install xlrd (with pip)
I would like to share my experiment though I still failed to install it.
It seems in my case that The python path should be /Library/Frameworks/Python.framework/Versions/3.6/bin. I try to create a symlink like ln -s /anaconda3/bin /Library/Frameworks/Python.framework/Versions/3.6/bin and then I can 'successfully' install QGIS3.
However when I open QGIS3 that I have installed. It crushed suddenly when loading the software without any dialog box showing any errors or warnings.
I am still wondering whether there are some libraries that I should install besides GDAL and what's the reason for its crush.
Best Answer
I faced the same problem: On Mojave the default python version seems 3.7 and As downgrading to python3.6 with
brew switch python 3.6.x, didn't make the installer error go away I installed qgis over brew:The version I ended up with is
3.4.1-Madeira