lesson 5 error in installing yarn

[heheboii11]

ramireddykarthikreddy@Ramireddys-MacBook-Air ether-simple-storage % npm i -g yarn
npm ERR! code EACCES
npm ERR! syscall mkdir
npm ERR! path /usr/local/lib/node_modules/yarn
npm ERR! errno -13
npm ERR! Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/yarn'
npm ERR! [Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/yarn'] {
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'mkdir',
npm ERR! path: '/usr/local/lib/node_modules/yarn'
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: /Users/ramireddykarthikreddy/.npm/_logs/2023-09-01T16_01_36_765Z-debug-0.log

getting this error can someone please help to to install yarn i am unable to install by this method or even by using corepack enable

[alfaqi]

You don't have permissions to run this command, you need to run this command as administrator (root),
run this command

sudo npm i -g yarn

or give the current user (ramireddykarthikreddy) permissions.
but
why you need the permissions to run this command??

[heheboii11]

it is asking for password what is the password

[alfaqi]

it is administrator's password

[heheboii11]

ramireddykarthikreddy@Ramireddys-MacBook-Air etherstorage % corepack enable
Internal Error: EACCES: permission denied, symlink '../lib/node_modules/corepack/dist/pnpm.js' -> '/usr/local/bin/pnpm'
Error: EACCES: permission denied, symlink '../lib/node_modules/corepack/dist/pnpm.js' -> '/usr/local/bin/pnpm'
getting this error

[alfaqi]

Same issue, you have to give permissions

sudo corepack enable

BUT
you must run these commands without permissions,
why you need the permissions??