Macos Big Sur port 80 permission denied with root im facing this problem where im trying to start a server on port 80 of a Macbook Pro with MacOS Big Sur and im getting permission denied.
I tried running with sudo and also doing &quot;sudo su&quot; and then running the server.
I'm trying running a Nuxt (node js) server
$ sudo npm run dev
Error: listen EACCES: permission denied 127.0.0.1:80

Should i unlock something?
No, everything is working as intended. You need sudo to have a command line process listen on low ports. There’s nothing you want to unlock here as this is a protective feature.
I usually just test on ports higher than 1024 to avoid this risk entirely until it’s time to write a proper wrapper script, but all three options are just as suitable. (Use sudo, use setuid permissions, change the port listen number)
To use sudo - run a shell first, then the npm command
sudo -s
npm run dev
exit