刚开始安装的时候不行, 后来改成开发版也不行:

 brew install nginx
brew upgrade --devel nginx

通过 launchctl 命令来启动, 还试过多次 unload 和 load :

 launchctl load ~/Library/LaunchAgents/homebrew.mxcl.nginx.plist

配置文件的内容是:

 <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>homebrew.mxcl.nginx</string>
    <key>RunAtLoad</key>
    <true/>
    <key>KeepAlive</key>
    <false/>
    <key>ProgramArguments</key>
    <array>
        <string>/usr/local/opt/nginx/bin/nginx</string>
        <string>-g</string>
        <string>daemon off;</string>
    </array>
    <key>WorkingDirectory</key>
    <string>/usr/local</string>
  </dict>
</plist>

监听 log 有看到报错, 但看不岀来具体信息:

 ➤➤ tail -f /var/log/system.log

 Feb 20 18:28:14 Air com.apple.launchd.peruser.501[244] (homebrew.mxcl.nginx[1200]): Exited with code: 1

另外手动 sudo nginx 或者配置文件里的路径又是对的,
对照 GitHub 上 Homebrew 的代码, 我的 Nginx 配置又不应该错的...
https://github.com/Homebrew/homebrew/blob/master/Library/Formula/nginx.rb#L138

现在看文件的权限是:

 ➤➤ ls -l /usr/local/opt/nginx/bin/nginx
-r-xr-xr-x  1 chen  admin  675992 Feb 11 10:16 /usr/local/opt/nginx/bin/nginx
➤➤ l -l /usr/local/Cellar/nginx/1.5.8/bin/nginx
-r-xr-xr-x  1 chen  admin  675992 Feb 11 10:16 /usr/local/Cellar/nginx/1.5.8/bin/nginx

visudo 里写的权限是:

 32
 33 # User privilege specification
 34 root    ALL=(ALL) ALL
 35 %admin  ALL=(ALL) ALL
 36
 37 # Uncomment to allow people in group wheel to run all commands
 38 # %wheel        ALL=(ALL) ALL
 39
 40 # Same thing without a password
 41 # %wheel        ALL=(ALL) NOPASSWD: ALL
 42 chen ALL=(ALL) NOPASSWD: ALL

求指点...

chmod u+s 不成功..

 ➤➤ sudo chmod u+s /usr/local/Cellar/nginx/1.5.8/bin/nginx
➤➤ ps aux | grep nginx
nobody           7254   0.0  0.0  2458140    916   ??  S     7:49PM   0:00.00 nginx: worker process
root             7253   0.0  0.0  2448924    360   ??  Ss    7:49PM   0:00.00 nginx: master process nginx
chen             7293   0.0  0.0  2432784    604 s002  S+    7:52PM   0:00.00 grep nginx
➤➤ sudo nginx -s stop
➤➤ launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.nginx.plist
homebrew.mxcl.nginx: Already loaded
➤➤ launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.nginx.plist
➤➤ launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.nginx.plist
➤➤ ps aux | grep nginx
chen             7316   0.0  0.0  2432784    608 s002  S+    7:52PM   0:00.00 grep nginx
➤➤ sudo nginx
nginx: [emerg] bind() to 0.0.0.0:80 failed (13: Permission denied)
➤➤ nginx
nginx: [emerg] bind() to 0.0.0.0:80 failed (13: Permission denied)
➤➤ sudo chmod u-s /usr/local/Cellar/nginx/1.5.8/bin/nginx
➤➤ nginx
nginx: [emerg] bind() to 0.0.0.0:80 failed (13: Permission denied)
➤➤ sudo nginx
➤➤