OpenPencil is now available from the official Homebrew cask tap as openpencil.
This custom tap is no longer maintained and is kept archived as a migration pointer.
brew install --cask openpencilIf you installed OpenPencil from this tap, uninstall the old cask and install the official one:
brew uninstall open-pencil/tap/open-pencil
brew install --cask openpencilbrew upgrade --cask openpencilbrew uninstall --cask openpencilOpenPencil: https://github.com/open-pencil/open-pencil Official Homebrew cask: https://formulae.brew.sh/cask/openpencil