Trying to run Gulp on Mac but it's not working - gulp

Question

I'm trying to run Gulp on my Mac. I went into terminal and cd'd into my gulp folder. When I type
gulp
I get "-bash: gulp: command not found". In my gulp folder I do have a gulpfile.js in there but again I get nothing. Where do I go from here?
Here's the errors I get when I npm install -g:
MacBook-Pro-2:gulp-dev damien$ npm install -g gulp
npm WARN deprecated minimatch#2.0.10: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated minimatch#0.2.14: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated graceful-fs#1.2.3: 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.
npm ERR! Darwin 16.3.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "-g" "gulp"
npm ERR! node v7.8.0
npm ERR! npm v4.2.0
npm ERR! path ../lib/node_modules/gulp/bin/gulp.js
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall symlink
npm ERR! Error: EACCES: permission denied, symlink '../lib/node_modules/gulp/bin/gulp.js' -> '/usr/local/bin/gulp'
npm ERR! { Error: EACCES: permission denied, symlink '../lib/node_modules/gulp/bin/gulp.js' -> '/usr/local/bin/gulp'
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'symlink',
npm ERR! path: '../lib/node_modules/gulp/bin/gulp.js',
npm ERR! dest: '/usr/local/bin/gulp' }
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! /Users/damien/.npm/_logs/2017-04-11T20_42_46_317Z-debug.log
MacBook-Pro-2:gulp-dev damien$ npm install -g gulp
npm WARN deprecated minimatch#2.0.10: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated minimatch#0.2.14: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated graceful-fs#1.2.3: 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.
npm ERR! Darwin 16.3.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "-g" "gulp"
npm ERR! node v7.8.0
npm ERR! npm v4.2.0
npm ERR! path ../lib/node_modules/gulp/bin/gulp.js
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall symlink
npm ERR! Error: EACCES: permission denied, symlink '../lib/node_modules/gulp/bin/gulp.js' -> '/usr/local/bin/gulp'
npm ERR! { Error: EACCES: permission denied, symlink '../lib/node_modules/gulp/bin/gulp.js' -> '/usr/local/bin/gulp'
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'symlink',
npm ERR! path: '../lib/node_modules/gulp/bin/gulp.js',
npm ERR! dest: '/usr/local/bin/gulp' }
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! /Users/damien/.npm/_logs/2017-04-11T20_43_48_551Z-debug.log

Answer 1

Have you installed Gulp on your machine yet?
If your folder has a package.json file, make sure you can see Gulp in there listed between your devDependencies. These dependencies are what you use during development of your Node project.
If you don't have a package.json file, you can create one in the command line via npm init, then install Gulp locally on your machine with npm install -g gulp, and then install the command line interface for gulp in your project folder: npm install --save-dev gulp-cli. The CLI will run the Gulp executable with the Gulpfile.js that's in your project.
More information can be found on their website: http://gulpjs.com/