@AOKP

Hi aokp, Could I get one? Thanks！

@PitaJ

run:
sudo chmod 777 .npm/source-map/

then npm install again:
$ npm install
npm WARN deprecated [email protected]: Please upgrade to 2.2.19 or higher
npm WARN deprecated [email protected]: wrench.js is deprecated! You should check out fs-extra (https://github.com/jprichardson/node-fs-extra) for any operations you were using wrench for. Thanks for all the usage over the years.
npm WARN deprecated [email protected]: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated [email protected]: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated [email protected]: graceful-fs v3.0.0 and before will fail on node releases >= v7.0. Please update to graceful-fs@^4.0.0 as soon as possible. Use 'npm ls graceful-fs' to find it in the tree.
[email protected] node_modules/require_optional/node_modules/semver -> node_modules/semver
[email protected] /Applications/XAMPP/xamppfiles/htdocs/NodeBB

though still have warning, but installed succeed. Thanks very much! I will go for next steps.

@PitaJ
Thanks for prompt answer.

install nodebb by:
git clone -b v1.4.0 https://github.com/NodeBB/NodeBB.git
success.

then:
cd NodeBB
npm install
show problem

npm -v : 3.10.10
node -v : v6.9.5

I re-installed mongodb and now the version is:
MongoDB shell version v3.4.2
and deleted nodebb folder and re-install but still the same problem.

I'm installing a fresh new forum as documentation in OSX system, but in "npm install" step, has below problem. previous steps all go well.

deprecated [email protected]: Please upgrade to 2.2.19 or higher
npm ERR! Darwin 16.4.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install"
npm ERR! node v6.9.5
npm ERR! npm v3.10.10
npm ERR! path /Users/chosean/.npm/source-map/0.5.6
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall mkdir

npm ERR! Error: EACCES: permission denied, mkdir '/Users/chosean/.npm/source-map/0.5.6'
npm ERR! at Error (native)
npm ERR! { Error: EACCES: permission denied, mkdir '/Users/chosean/.npm/source-map/0.5.6'
npm ERR! at Error (native)
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'mkdir',
npm ERR! path: '/Users/chosean/.npm/source-map/0.5.6',
npm ERR! parent: 'postcss' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

npm ERR! Please include the following file with any support request:
npm ERR! /Applications/XAMPP/xamppfiles/htdocs/NodeBB/npm-debug.log

Tried to solve it but really don't understand it. how to do with it? Thanks very much