環境

MacBook Pro(Touch Bar搭載)
macOS Sierra(10.12.1)

その前にmacOS SierraにHomebrewをインストール済。

Nodebrewインストール

Node.jsはバージョン管理したいのでNodebrew導入。

$ brew install nodebrew
==> Using the sandbox
==> Downloading https://github.com/hokaccha/nodebrew/archive/v0.9.6.tar.gz
Already downloaded: /Users/xxxxxx/Library/Caches/Homebrew/nodebrew-0.9.6.tar.gz
==> /usr/local/Cellar/nodebrew/0.9.6/bin/nodebrew setup_dirs
==> Caveats
Add path:
  export PATH=$HOME/.nodebrew/current/bin:$PATH

To use Homebrew's directories rather than ~/.nodebrew add to your profile:
  export NODEBREW_ROOT=/usr/local/var/nodebrew

Bash completion has been installed to:
  /usr/local/etc/bash_completion.d

zsh completion has been installed to:
  /usr/local/share/zsh/site-functions
==> Summary
🍺  /usr/local/Cellar/nodebrew/0.9.6: 8 files, 37.9K, built in 1 second

Node.jsインストール

そのまま最新版Node.js導入。

$ nodebrew install-binary latest
Fetching: https://nodejs.org/dist/v7.2.0/node-v7.2.0-darwin-x64.tar.gz
Warning: Failed to create the file 
Warning: /Users/xxxxxx/.nodebrew/src/v7.2.0/node-v7.2.0-darwin-x64.tar.gz: No 
Warning: such file or directory
                                                                           0.0%
curl: (23) Failed writing body (0 != 941)
download failed: https://nodejs.org/dist/v7.2.0/node-v7.2.0-darwin-x64.tar.gz

おっと、失敗（汗
これが必要でしたか。

$ nodebrew setup
Fetching nodebrew...
Installed nodebrew in $HOME/.nodebrew

========================================
Export a path to nodebrew:

export PATH=$HOME/.nodebrew/current/bin:$PATH
========================================

リトライ。

$ nodebrew install-binary latest
Fetching: https://nodejs.org/dist/v7.2.0/node-v7.2.0-darwin-x64.tar.gz
######################################################################## 100.0%
Installed successfully

上手くいきました。