Installing Angular on Mac OS 10.13 - node.js

Question

I'm trying to follow the quickstart on running Angular locally (on MacOS 10.13.6). With the first command, I already get some errors:
npm install -g #angular/cli
Output:
npm ERR! path /usr/local/lib/node_modules/#angular/cli/node_modules/socks
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access
npm ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules/#angular/cli/node_modules/socks'
npm ERR! { [Error: EACCES: permission denied, access '/usr/local/lib/node_modules/#angular/cli/node_modules/socks']
npm ERR! stack:
npm ERR! 'Error: EACCES: permission denied, access \'/usr/local/lib/node_modules/#angular/cli/node_modules/socks\'',
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'access',
npm ERR! path:
npm ERR! '/usr/local/lib/node_modules/#angular/cli/node_modules/socks' }
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 (though this is not recommended).
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/xxx/.npm/_logs/2019-03-12T23_55_12_063Z-debug.log
Running with sudo gives me the following:
gyp ERR! configure error
gyp ERR! stack Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/#angular/cli/node_modules/fsevents/.node-gyp'
gyp ERR! System Darwin 17.7.0
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "configure" "--fallback-to-build" "--module=/usr/local/lib/node_modules/#angular/cli/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64/fse.node" "--module_name=fse" "--module_path=/usr/local/lib/node_modules/#angular/cli/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64" "--napi_version=3" "--node_abi_napi=napi"
gyp ERR! cwd /usr/local/lib/node_modules/#angular/cli/node_modules/fsevents
gyp ERR! node -v v10.15.3
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
node-pre-gyp ERR! build error
node-pre-gyp ERR! stack Error: Failed to execute '/usr/local/bin/node /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/usr/local/lib/node_modules/#angular/cli/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64/fse.node --module_name=fse --module_path=/usr/local/lib/node_modules/#angular/cli/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64 --napi_version=3 --node_abi_napi=napi' (1)
node-pre-gyp ERR! stack at ChildProcess.<anonymous> (/usr/local/lib/node_modules/#angular/cli/node_modules/fsevents/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
node-pre-gyp ERR! stack at ChildProcess.emit (events.js:189:13)
node-pre-gyp ERR! stack at maybeClose (internal/child_process.js:970:16)
node-pre-gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:259:5)
node-pre-gyp ERR! System Darwin 17.7.0
node-pre-gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/#angular/cli/node_modules/fsevents/node_modules/node-pre-gyp/bin/node-pre-gyp" "install" "--fallback-to-build"
node-pre-gyp ERR! cwd /usr/local/lib/node_modules/#angular/cli/node_modules/fsevents
node-pre-gyp ERR! node -v v10.15.3
node-pre-gyp ERR! node-pre-gyp -v v0.10.3
node-pre-gyp ERR! not ok
Failed to execute '/usr/local/bin/node /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/usr/local/lib/node_modules/#angular/cli/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64/fse.node --module_name=fse --module_path=/usr/local/lib/node_modules/#angular/cli/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64 --napi_version=3 --node_abi_napi=napi' (1)
My node version is LTS (10.15.3). Any idea what's causing this and how to get angular to run on Mac?

Answer 1

you will need the write permission in node_modules directory:
sudo chown -R $(whoami) ~/.npm
Running sudo when installing npm will give you problems in the long run, so just run the command above.
npm throws error without sudo

Answer 2

sudo npm install -g #angular/cli
run with sudo permission and you should be good.

Answer 3

the /usr/local folder needs root permission, please try install it with sudo :
sudo npm install -g #angular/cli

Answer 4

As mentioned in the comments, using sudo isn't good practice, I had to run the following 3 commands to gain ownership of the relevant directories:
sudo chown -R $(whoami) ~/.npm
sudo chown -R $(whoami) /usr/local/lib/node_modules
sudo chown -R $(whoami) /usr/local/bin
Now I can install Angular CLI (or any other node packages) globally, without the need for sudo.