qgis3 Permission Error

[abruto]

I work on an Apple M1 with Monterey. When starting qgis this error comes up. It runs ok after that but every script in the program fails with a similar error

PermissionError: [Errno 13] Permission denied: '/opt/local/share/grass78/etc/colors/grass' 
Traceback (most recent call last):
  File "/Applications/MacPorts/QGIS3.app/Contents/MacOS/../Resources/python/plugins/grassprovider/Grass7AlgorithmProvider.py", line 106, in loadAlgorithms
    version = Grass7Utils.installedVersion(True)
  File "/Applications/MacPorts/QGIS3.app/Contents/MacOS/../Resources/python/plugins/grassprovider/Grass7Utils.py", line 116, in installedVersion
    with subprocess.Popen(
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 951, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 1821, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
PermissionError: [Errno 13] Permission denied: '/opt/local/share/grass78/etc/colors/grass'


Python-Version: 3.9.9 (main, Nov 16 2021, 07:57:58) [Clang 13.0.0 (clang-1300.0.29.3)] 
QGIS-Version: 3.22.0-Białowieża Białowieża, exported 

Python-Pfad:
/Applications/MacPorts/QGIS3.app/Contents/MacOS/../Resources/python
/Users/constantin/Library/Application Support/QGIS/QGIS3/profiles/default/python
/Users/constantin/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins
/Applications/MacPorts/QGIS3.app/Contents/MacOS/../Resources/python/plugins
/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python39.zip
/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9
/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/lib-dynload
/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
/Users/constantin/Library/Application Support/QGIS/QGIS3/profiles/default/python

[Veence (Vincent)]

Yeah, I know. This is caused by a bug somewhere in the Python script. There’s a simple workaround, namely linking ${prefix}/bin/grass78 into the ${prefix}/share/grass78 directory. I should probably implement the patch as a standard feature of the grass7 port, but I’m still waiting for my new MacBookPro to arrive :/

[abruto]

this solves the error with grass78 indeed. however when using for example GDAL-Tools similar errors occur. Could this be solved the same way?

[abruto]

adding /opt/local/bin: as a custom prepend environment variable named PATH under QGIS - Settings - System solves the problem. Replying to abruto:

this solves the error with grass78 indeed. however when using for example GDAL-Tools similar errors occur. Could this be solved the same way?

[Veence (Vincent)]

Yep, I did that too, but didn’t remember it had to do with this problem. I will document that in a note Thanks a bunch for figuring it out on your own.