Unfortunatley that doesn’t work for me either.
It fails with the following error:
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "Untitled-0", line 13, in <module>
File "Untitled-0", line 11, in install
File "/Applications/QGIS
4.app/Contents/Frameworks/lib/python3.12/subprocess.py", line 413, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/Applications/QGIS
4.app/Contents/MacOS/python', '-m', 'pip', 'install', 'matplotlib']' returned
non-zero exit status 126.
On Sat, 14 Mar 2026, at 10:25 PM, Ujaval Gandhi wrote:
> Hi Josh,
>
> Use the snippet below. This was suggested by Matthias Kuhn in this
> discussion.
> https://github.com/qgis/QGIS/issues/63939#issuecomment-3621819919. Tested and
> works fine on QGIS 4.0.0 on Mac
>
> import subprocess
> import sys
> from pathlib import Path
>
> # Get the root directory with our applications
> python_dir = Path(sys.executable).parent
>
> python_executable = python_dir / "python"
>
> def install(package):
> subprocess.check_call([str(python_executable), "-m", "pip", "install",
> package])
>
> install("yourpackage")
>
> ---
> Ujaval Gandhi
> Spatial Thoughts
> www.spatialthoughts.com
>
>
>
> On Fri, Mar 13, 2026 at 5:52 AM Josh Mawer via QGIS-User
> <[email protected]> wrote:
>> __
>> Hi QGIS User List,
>>
>> I am developing a python based QGIS processing script which is working great
>> on a Windows installation. However, when I try to run it on my Mac I get an
>> error stating the Matplotlib package is not installed in the python
>> environment.
>>
>> How can I install additional packages into the QGIS python environment? I
>> have found a few old StackOverflow threads mentioning installing via Pip3
>> from within the QGIS Application Package. However, Pip3 doesn't seem to be
>> contained there any more.
>>
>> Any thoughts? Thanks,
>> _______________________________________________
>> QGIS-User mailing list
>> [email protected]
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>
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