brew install yarn --without-nodeオプションを付けると動かない
$ brew install yarn --without-node Updating Homebrew... ==> Auto-updated Homebrew! Error: invalid option: --without-node
こないな感じでそんなオプションありまへんでって言われる
無くなったらしい
$ brew install yarn --ignore-dependencies Warning: --ignore-dependencies is an unsupported Homebrew developer flag! Adjust your PATH to put any preferred versions of applications earlier in the PATH rather than using this unsupported flag!
これで上手くいく