https://pillow.readthedocs.io/en/latest/installation/building-from-source.html

To install libraqm on macOS use Homebrew to install its dependencies:

brew install freetype harfbuzz fribidi
Then see depends/install_raqm_cmake.sh to install libraqm.

This documented process can be made simpler by suggesting that users just brew install libraqm instead.

We have been using the libraqm formula in GitHub Actions since #5061.