按照下面這個人的教學就能成功安裝

【安裝 nginx】on Mac

不同的是，根據版本不同，nginx 安裝路徑也已經變了

Docroot is: /opt/homebrew/var/www

The default port has been set in /opt/homebrew/etc/nginx/nginx.conf to 8080 so that
nginx can run without sudo.

nginx will load all files in /opt/homebrew/etc/nginx/servers/.

To restart nginx after an upgrade:
  brew services restart nginx

Or, if you don't want/need a background service you can just run:
  /opt/homebrew/opt/nginx/bin/nginx -g daemon off;

==> Summary
🍺  /opt/homebrew/Cellar/nginx/1.23.4: 26 files, 2.2MB
==> Running `brew cleanup nginx`...
Disable this behaviour by setting HOMEBREW_NO_INSTALL_CLEANUP.
Hide these hints with HOMEBREW_NO_ENV_HINTS (see `man brew`).
==> Caveats
==> nginx
Docroot is: /opt/homebrew/var/www

The default port has been set in /opt/homebrew/etc/nginx/nginx.conf to 8080 so that
nginx can run without sudo.

nginx will load all files in /opt/homebrew/etc/nginx/servers/.

所以想修改設定要改成去 /opt/homebrew/etc/nginx/nginx.conf

nginx -s stop 可以停止 nginx

nginx 可以啟動 nginx