Error: EACCES: permission denied, access '/usr/local/lib/node_modules'

Change your file permissions... Like this

First check who owns the directory

ls -la /usr/local/lib/node_modules

it is denying access because the node_module folder is owned by root

drwxr-xr-x   3 root    wheel  102 Jun 24 23:24 node_modules

so this needs to be changed by changing root to your user but first run command below to check your current user How do I get the name of the active user via the command line in OS X?

id -un OR whoami

Then change owner

sudo chown -R [owner]:[owner] /usr/local/lib/node_modules

OR

sudo chown -R ownerName: /usr/local/lib/node_modules

OR

sudo chown -R $USER /usr/local/lib/node_modules

All you need to do is to add USER to the owner of /local/lib

sudo chown -R $USER /usr/local/lib

EDIT :

To target precisely and only the node_modules folder, try using this command before using the previous one :

sudo chown -R $USER /usr/local/lib/node_modules

To minimize the chance of permissions errors, you can configure npm to use a different directory. In this example, you will create and use a hidden directory in your home directory.

Back up your computer. On the command line, in your home directory, create a directory for global installations:

mkdir ~/.npm-global

Configure npm to use the new directory path:

npm config set prefix '~/.npm-global'

In your preferred text editor, open or create the ~/.profile file and add this line:

export PATH=~/.npm-global/bin:$PATH

On the command line, update your system variables:

source ~/.profile

To test your new configuration, install a package globally without using sudo.