Cannot install on MAC

[stefanopog]

When I install GLOBAL on MAC using

sudo nom install -g @ibm-functions/shell

I get an error

`
stefanomac:~ stefano$ sudo npm install -g @ibm-functions/shell
Password:
/usr/local/bin/fsh -> /usr/local/lib/node_modules/@ibm-functions/shell/bin/fsh

@ibm-functions/shell@1.3.401 postinstall /usr/local/lib/node_modules/@ibm-functions/shell
node bin/install.js

/usr/local/lib/node_modules/@ibm-functions/shell/bin/install.js:73
if (err) throw err
^

Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/@ibm-functions/shell/tmp-78772TfeGSh6I75vd'
`

Any idea what I do need to do?
Thanks

[rabbah]

npm version?

[starpit]

also, how did you originally install nodejs on your mac?

[stefanopog]

I changed the permissions on /usr/local/ to be ugo+rwx and it worked !