1 使用brew安装nginx
brew install nginx
如果homebrew不是最新版本，会先更新，
Updating Homebrew...
当然可以设置不自动更新（网上搜吧。。）
2 安装完成之后，执行如下命令启动:
sudo nginx
若出现，
nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use)
有其它进程占用8080端口，可以打开/usr/local/etc/nginx/nginx.conf文件修改默认端口。
3 测试
访问http://localhost:8080，将显示nginx的欢迎页面。
4 修改配置文件
sudo vim /usr/local/etc/nginx/nginx.conf #修改默认的8080端口为80