我是通过brewhome 来安装的。
brew install nginx 一路顺畅。
hematoMacBook-Pro:~ hechangmin$ brew search nginx
nginx
hematoMacBook-Pro:~ hechangmin$ brew install nginx
==> Installing nginx dependency: pcre
==> Downloading ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.13.
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==> ./configure --prefix=/usr/local/Cellar/pcre/8.13 --enable-utf8 --enable-unic
==> make test
==> make install
/usr/local/Cellar/pcre/8.13: 111 files, 2.9M, built in 54 seconds
==> Installing nginx
==> Downloading http://nginx.org/download/nginx-1.0.8.tar.gz
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==> Patching
patching file auto/lib/pcre/conf
patching file conf/nginx.conf
==> ./configure --prefix=/usr/local/Cellar/nginx/1.0.8 --with-http_ssl_module --with-pcre --conf-path=/usr/local/etc/nginx/nginx.conf --pid-path=/usr/local/var/run/nginx.pid --lock-path=/usr/local/var/ngi
==> make install
==> Caveats
In the interest of allowing you to run `nginx` without `sudo`, the default
port is set to localhost:8080.
If you want to host pages on your local machine to the public, you should
change that to localhost:80, and run `sudo nginx`. You'll need to turn off
any other web servers running port 80, of course.
You can start nginx automatically on login running as your user with:
mkdir -p ~/Library/LaunchAgents
cp /usr/local/Cellar/nginx/1.0.8/org.nginx.nginx.plist ~/Library/LaunchAgents/
launchctl load -w ~/Library/LaunchAgents/org.nginx.nginx.plist
Though note that if running as your user, the launch agent will fail if you
try to use a port below 1024 (such as http's default of 80.)
Warning: /usr/local/sbin is not in your PATH
You can amend this by altering your ~/.bashrc file
==> Summary
/usr/local/Cellar/nginx/1.0.8: 6 files, 616K, built in 19 seconds
hematoMacBook-Pro:~ hechangmin$
启动nginx ，sudo nginx ;访问localhost:8080 发现已出现nginx的欢迎页面了。
备注： ln -s /usr/local/sbin/nginx /usr/bin/nginx 做了个软连接。
常用的指令有：
nginx -V 查看版本，以及配置文件地址
nginx -v 查看版本
nginx -c filename 指定配置文件
nginx -h 帮助
nginx -s [reloadreopenstopquit]
brew search mysql : 搜索具体的程序包
brew install mysql : 安装具体的程序包
brew info mysql : 查看具体程序的信息
brew uninstall mysql : 卸载具体的应用（这里只是用mysql 作个例子） 配置文件地址：/usr/local/etc/nginx/nginx.conf
编辑内容，可以制定web 目录，以及PHP 、python 等。