Prepare For Mac User

For Mac users, you should first run the following additional command:

brew install cairo pango gdk-pixbuf libffi

Then reactivate your virtual environment:

deactivate
source venv/bin/activate

If you are using Apple Silicon (M1/M2/M3/M4)

Run:

export DYLD_FALLBACK_LIBRARY_PATH=/opt/homebrew/lib

Then test:

python -c "from weasyprint import HTML; print('OK')"

If you are using an Intel Mac

Run:

export DYLD_FALLBACK_LIBRARY_PATH=/usr/local/lib

Make It Permanent (Recommended)

If the previous step works, add the environment variable to your shell configuration. If you are using zsh, open:

nano ~/.zshrc

Add the following line:

Apple Silicon

export DYLD_FALLBACK_LIBRARY_PATH=/opt/homebrew/lib

Intel Mac

export DYLD_FALLBACK_LIBRARY_PATH=/usr/local/lib

Save the file, then run:

source ~/.zshrc