Hyperledger Fabric is an enterprise-grade permissioned distributed ledger framework for developing solutions and applications. Its modular and versatile design satisfies a broad range of industry use cases. It offers a unique approach to consensus that enables performance at scale while preserving privacy.
I guess this refers to the development environment set up instructions in the v2.2 and/or v2.3 documentation? I suspect that this commands were probably correct at the time of release, and has already been updated to the new syntax in the v2.4 and latest documentation.
This is the outdated code brew cask install --appdir="/Applications" docker
Should be using: brew install --cask --appdir="/Applications" docker