How to get CSS changes applied to Sage theme

[ben]

For macOS:

Sage 9 error with mozjpeg when running build:production

Assure libpng is installed and up to date with brew. If it is, try relinking it with: brew unlink libpng && brew link libpng If all else fails: brew reinstall libpng

For Linux:

https://discourse.roots.io/t/yarn-build-production-failing-asset-optimizationerror-write-epipe/12219/4