SASS install problems

Question

I'm working through a tutorial on npm and I've hit a roadblock installing node on my Mac running High Serria

I ran:

npm install sass

and got this:

npm WARN old lockfile so supplemental metadata must be fetched from the registry.

npm WARN old lockfile

npm WARN old lockfile This is a one-time fix-up, please be patient...

npm WARN old lockfile

npm ERR! code EACCES

npm ERR! syscall rename

npm ERR! path /Users/Andy/node_modules/ansi-gray

npm ERR! dest /Users/Andy/node_modules/.ansi-gray-NrmG8bey

npm ERR! errno -13

npm ERR! Error: EACCES: permission denied, rename '/Users/Andy/node_modules/ansi-gray' -> '/Users/Andy/node_modules/.ansi-gray-NrmG8bey'

npm ERR! [Error: EACCES: permission denied, rename '/Users/Andy/node_modules/ansi-gray' -> '/Users/Andy/node_modules/.ansi-gray-NrmG8bey'] {

npm ERR! errno: -13,

npm ERR! code: 'EACCES',

npm ERR! syscall: 'rename',

npm ERR! path: '/Users/Andy/node_modules/ansi-gray',

npm ERR! dest: '/Users/Andy/node_modules/.ansi-gray-NrmG8bey'

npm ERR! }

npm ERR!

npm ERR! The operation was rejected by your operating system. npm ERR! It is likely you do not have the permissions to access this file as the current user

npm ERR!

npm ERR! If you believe this might be a permissions issue, please double-check the

npm ERR! permissions of the file and its containing directories, or try running

npm ERR! the command again as root/Administrator.

npm ERR! A complete log of this run can be found in:

npm ERR! /Users/Andy/.npm/_logs/2022-02-23T19_29_32_379Z-debug-0.log