brew / homebrew

restore all brew packages on a new system

create a Brewfile ... well, on your old/original system

brew bundle dump --file Brewfile

install all packages:

brew bundle

update brew (packages/apps)

brew update
brew upgrade
brew cask upgrade

clear cache

because brew cleanup does not clean up.

rm -r $(brew --cache)

there's also:

brew cleanup

to make it even more confusing, there's also:

brew cleanup -s

Scrub the cache, including downloads for even the latest versions. Note downloads for any installed formulae or casks will still not be deleted. If you want to delete those too: rm -rf "$(brew --cache)"

reinstall all packages

brew list | xargs brew reinstall