Failing to load Image from PIL in macOS with 9.4.0

[jbeghtol]

We are currently using PIL on macOS inside a VENV to limit packaged. Today when we updated to 9.4.0 PIL stopped working on MacOS (these are x86_64 versions).

Steps to reproduce:

1. setup venv (this was seen in python 3.9.4, 3.9.6, and also a 3.8.x version I don't recall)
2. pip install Pillow
3. python, from PIL import Image

(note, some parts of the path were trimmed)

python3
> from PIL import Image
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File ".venv/lib/python3.9/site-packages/PIL/Image.py", line 103, in <module>
    from . import _imaging as core
ImportError: dlopen(.venv/lib/python3.9/site-packages/PIL/_imaging.cpython-39-darwin.so, 2): Library not loaded: @loader_path/libXdmcp.6.dylib
  Referenced from: .venv/lib/python3.9/site-packages/PIL/.dylibs/libxcb.1.1.0.dylib
  Reason: no suitable image found.  Did find:
	.venv/lib/python3.9/site-packages/PIL/.dylibs/libXdmcp.6.dylib: cannot load 'libXdmcp.6.dylib' (load command 0x80000034 is unknown)
	.venv/lib/python3.9/site-packages/PIL/.dylibs/libXdmcp.6.dylib: cannot load 'libXdmcp.6.dylib' (load command 0x80000034 is unknown)

Have seen this on two different machines and it was reproducible on both after recreating a venv.

[radarhere]

Hi. What version of macOS are you using?

[nixis-institute]

Same issue with me
i'm using 10.13.6 (macOS High Sierra)

[jbeghtol]

For myself, it was Mojave 10.14.6.

[jbeghtol]

Also if helpful, I thought the DLC path when looking at the dependencies of the failing dylib curious as its invalid

(.venv) justin@mac:~/.venv/lib/python3.8/site-packages/PIL/.dylibs$ otool -L libxcb.1.1.0.dylib
libxcb.1.1.0.dylib:
	/DLC/PIL/.dylibs/libxcb.1.1.0.dylib (compatibility version 3.0.0, current version 3.0.0)
	@loader_path/libXau.6.0.0.dylib (compatibility version 7.0.0, current version 7.0.0)
	@loader_path/libXdmcp.6.dylib (compatibility version 7.0.0, current version 7.0.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1311.100.3)

[radarhere]

Thanks. The problem was occurring for macOS < 11.

python-pillow/pillow-wheels#358 has been merged to fix this for future Pillow wheels. If you would like an immediate solution, https://github.com/python-pillow/pillow-wheels/suites/10193756587/artifacts/499253201 has fixed wheels.

[radarhere]

I've uploaded new Pillow 9.4.0 wheels to PyPI. If you try installing from pip again, the problem should be fixed.

[jbeghtol]

Appreciate the quick response! Not sure how to tell when the wheel is updated, I tried to pip3 cache purge, installed 9.4.0 and got Pillow-9.4.0-1-cp38-cp38-macosx_10_10_x86_64.whl which has the same issue, but maybe not updated?

Collecting Pillow==9.4.0
  Downloading Pillow-9.4.0-1-cp38-cp38-macosx_10_10_x86_64.whl (3.3 MB)
...
Successfully installed Pillow-9.4.0
(.venv) justin@mac:~$ python3
>>> from PIL import Image
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/justin/.venv/lib/python3.8/site-packages/PIL/Image.py", line 103, in <module>
    from . import _imaging as core
ImportError: dlopen(/Users/justin/.venv/lib/python3.8/site-packages/PIL/_imaging.cpython-38-darwin.so, 2): Library not loaded: @loader_path/libXdmcp.6.dylib

[radarhere]

Pillow-9.4.0-1-cp38-cp38-macosx_10_10_x86_64.whl should be working. Could you uninstall Pillow, check that Pillow can't be imported, and then install again?

[jgrean81]

I am having this issue today. New workspace, venv, install pillow, bam.
Mac OS 10.13.6

Import error for
.venv/lib/python3.9/site-packages/PIL/.dylibs/libXdmcp.6.dylib: cannot load 'libXdmcp.6.dylib' (load command 0x80000034 is unknown)

As above, uninstalled pillow, then pip3 cache purge, then verified I could not import, before reinstalling pillow. Same error.

[radarhere]

I've created a zip of the new wheels from https://pypi.org/project/Pillow/#files.
If you install one of the wheels from it - pillow-macos.zip - using python3 -m pip install Pillow-9.4.0-1-cp38-cp38-macosx_10_10_x86_64.whl (or whichever wheel matches your Python version) then does that work? I am hoping this is just caching somewhere along the line.

[radarhere]

Unfortunately, GitHub Actions won't allow me to test 10.13 or 10.14.

10.15 works as far as I see - https://github.com/radarhere/Pillow/actions/runs/3870668581

[yacineCo]

Hi everyone, i am have also the same issue but with matplotlib (like you @jbeghtol i am Mojave 10.14.6)

I have tried to uninstall/reinstall package on a new venv it doesn't work at all.

[radarhere]

If you download the wheels from the zip in my earlier comment, and python3 -m pip install Pillow-9.4.0-1-cp38-cp38-macosx_10_10_x86_64.whl (or whichever wheel matches your Python version) then does that work?